diff --git a/README.md b/README.md
index 71df233b0..0210b4caf 100644
--- a/README.md
+++ b/README.md
@@ -89,9 +89,9 @@ KMath is a modular library. Different modules provide different features with di
 >
 > **Features:**
 > - [expression-language](kmath-ast/src/jvmMain/kotlin/space/kscience/kmath/ast/parser.kt) : Expression language and its parser
-> - [mst](kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MST.kt) : MST (Mathematical Syntax Tree) as expression language's syntax intermediate representation
-> - [mst-building](kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt) : MST building algebraic structure
-> - [mst-interpreter](kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MST.kt) : MST interpreter
+> - [mst](kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MST.kt) : MST (Mathematical Syntax Tree) as expression language's syntax intermediate representation
+> - [mst-building](kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MstAlgebra.kt) : MST building algebraic structure
+> - [mst-interpreter](kmath-ast/src/commonMain/kotlin/space/kscience/kmath/ast/MST.kt) : MST interpreter
 > - [mst-jvm-codegen](kmath-ast/src/jvmMain/kotlin/space/kscience/kmath/asm/asm.kt) : Dynamic MST to JVM bytecode compiler
 > - [mst-js-codegen](kmath-ast/src/jsMain/kotlin/space/kscience/kmath/estree/estree.kt) : Dynamic MST to JS compiler
 
@@ -171,15 +171,16 @@ One can still use generic algebras though.
 <hr/>
 
 * ### [kmath-functions](kmath-functions)
-> Functions and interpolation
+> Functions, integration and interpolation
 >
-> **Maturity**: PROTOTYPE
+> **Maturity**: EXPERIMENTAL
 >
 > **Features:**
-> - [piecewise](kmath-functions/Piecewise functions.) : src/commonMain/kotlin/space/kscience/kmath/functions/Piecewise.kt
-> - [polynomials](kmath-functions/Polynomial functions.) : src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt
-> - [linear interpolation](kmath-functions/Linear XY interpolator.) : src/commonMain/kotlin/space/kscience/kmath/interpolation/LinearInterpolator.kt
-> - [spline interpolation](kmath-functions/Cubic spline XY interpolator.) : src/commonMain/kotlin/space/kscience/kmath/interpolation/SplineInterpolator.kt
+> - [piecewise](kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Piecewise.kt) : Piecewise functions.
+> - [polynomials](kmath-functions/src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt) : Polynomial functions.
+> - [linear interpolation](kmath-functions/src/commonMain/kotlin/space/kscience/kmath/interpolation/LinearInterpolator.kt) : Linear XY interpolator.
+> - [spline interpolation](kmath-functions/src/commonMain/kotlin/space/kscience/kmath/interpolation/SplineInterpolator.kt) : Cubic spline XY interpolator.
+> - [integration](kmath-functions/#) : Univariate and multivariate quadratures
 
 <hr/>
 
@@ -250,6 +251,10 @@ cases. We expect the worst KMath benchmarks will perform better than native Pyth
 native/SciPy (mostly due to boxing operations on primitive numbers). The best performance of optimized parts could be 
 better than SciPy.
 
+## Requirements
+
+KMath currently relies on JDK 11 for compilation and execution of Kotlin-JVM part. We recommend to use GraalVM-CE 11 for execution in order to get better performance.
+
 ### Repositories
 
 Release and development artifacts are accessible from mipt-npm [Space](https://www.jetbrains.com/space/) repository `https://maven.pkg.jetbrains.space/mipt-npm/p/sci/maven` (see documentation of
@@ -261,8 +266,8 @@ repositories {
 }
 
 dependencies {
-    api("space.kscience:kmath-core:0.3.0-dev-4")
-    // api("space.kscience.kmath:kmath-core-jvm:0.3.0-dev-4") for jvm-specific version
+    api("space.kscience:kmath-core:0.3.0-dev-6")
+    // api("space.kscience:kmath-core-jvm:0.3.0-dev-6") for jvm-specific version
 }
 ```
 
diff --git a/docs/templates/README-TEMPLATE.md b/docs/templates/README-TEMPLATE.md
index 9e51fcbe8..99951b4d6 100644
--- a/docs/templates/README-TEMPLATE.md
+++ b/docs/templates/README-TEMPLATE.md
@@ -94,6 +94,10 @@ cases. We expect the worst KMath benchmarks will perform better than native Pyth
 native/SciPy (mostly due to boxing operations on primitive numbers). The best performance of optimized parts could be 
 better than SciPy.
 
+## Requirements
+
+KMath currently relies on JDK 11 for compilation and execution of Kotlin-JVM part. We recommend to use GraalVM-CE 11 for execution in order to get better performance.
+
 ### Repositories
 
 Release and development artifacts are accessible from mipt-npm [Space](https://www.jetbrains.com/space/) repository `https://maven.pkg.jetbrains.space/mipt-npm/p/sci/maven` (see documentation of
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
index 2059e8ea0..442d9132e 100644
--- a/gradle/wrapper/gradle-wrapper.properties
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -1,8 +1,3 @@
-#
-# Copyright 2018-2021 KMath contributors.
-# Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
-#
-
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 distributionUrl=https\://services.gradle.org/distributions/gradle-6.8.3-bin.zip
diff --git a/kmath-ast/README.md b/kmath-ast/README.md
index 547775efc..b1ef9c7d3 100644
--- a/kmath-ast/README.md
+++ b/kmath-ast/README.md
@@ -3,16 +3,16 @@
 Abstract syntax tree expression representation and related optimizations.
 
  - [expression-language](src/jvmMain/kotlin/space/kscience/kmath/ast/parser.kt) : Expression language and its parser
- - [mst](../kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MST.kt) : MST (Mathematical Syntax Tree) as expression language's syntax intermediate representation
- - [mst-building](../kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MstAlgebra.kt) : MST building algebraic structure
- - [mst-interpreter](../kmath-core/src/commonMain/kotlin/space/kscience/kmath/expressions/MST.kt) : MST interpreter
+ - [mst](src/commonMain/kotlin/space/kscience/kmath/ast/MST.kt) : MST (Mathematical Syntax Tree) as expression language's syntax intermediate representation
+ - [mst-building](src/commonMain/kotlin/space/kscience/kmath/ast/MstAlgebra.kt) : MST building algebraic structure
+ - [mst-interpreter](src/commonMain/kotlin/space/kscience/kmath/ast/MST.kt) : MST interpreter
  - [mst-jvm-codegen](src/jvmMain/kotlin/space/kscience/kmath/asm/asm.kt) : Dynamic MST to JVM bytecode compiler
  - [mst-js-codegen](src/jsMain/kotlin/space/kscience/kmath/estree/estree.kt) : Dynamic MST to JS compiler
 
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-ast:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-ast:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -23,7 +23,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-ast:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-ast:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -35,7 +35,7 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-ast:0.3.0-dev-4")
+    implementation("space.kscience:kmath-ast:0.3.0-dev-6")
 }
 ```
 
@@ -52,7 +52,7 @@ For example, the following builder:
 DoubleField.mstInField { symbol("x") + 2 }.compile()
 ``` 
 
-… leads to generation of bytecode, which can be decompiled to the following Java class:
+… leads to generation of bytecode, which can be decompiled to the following Java class:
 
 ```java
 package space.kscience.kmath.asm.generated;
diff --git a/kmath-complex/README.md b/kmath-complex/README.md
index ec5bf289f..3a05c3d6d 100644
--- a/kmath-complex/README.md
+++ b/kmath-complex/README.md
@@ -8,7 +8,7 @@ Complex and hypercomplex number systems in KMath.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-complex:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-complex:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -19,7 +19,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-complex:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-complex:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -31,6 +31,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-complex:0.3.0-dev-4")
+    implementation("space.kscience:kmath-complex:0.3.0-dev-6")
 }
 ```
diff --git a/kmath-core/README.md b/kmath-core/README.md
index 5e4f1765d..b83fb13d0 100644
--- a/kmath-core/README.md
+++ b/kmath-core/README.md
@@ -15,7 +15,7 @@ performance calculations to code generation.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-core:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-core:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -26,7 +26,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-core:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-core:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -38,6 +38,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-core:0.3.0-dev-4")
+    implementation("space.kscience:kmath-core:0.3.0-dev-6")
 }
 ```
diff --git a/kmath-ejml/README.md b/kmath-ejml/README.md
index 1f13a03c5..cae11724d 100644
--- a/kmath-ejml/README.md
+++ b/kmath-ejml/README.md
@@ -9,7 +9,7 @@ EJML based linear algebra implementation.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-ejml:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-ejml:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -20,7 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-ejml:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-ejml:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -32,6 +32,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-ejml:0.3.0-dev-4")
+    implementation("space.kscience:kmath-ejml:0.3.0-dev-6")
 }
 ```
diff --git a/kmath-for-real/README.md b/kmath-for-real/README.md
index f9c6ed3a0..922e6572b 100644
--- a/kmath-for-real/README.md
+++ b/kmath-for-real/README.md
@@ -9,7 +9,7 @@ Specialization of KMath APIs for Double numbers.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-for-real:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-for-real:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -20,7 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-for-real:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-for-real:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -32,6 +32,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-for-real:0.3.0-dev-4")
+    implementation("space.kscience:kmath-for-real:0.3.0-dev-6")
 }
 ```
diff --git a/kmath-functions/README.md b/kmath-functions/README.md
index 1e4b06e0f..eef677565 100644
--- a/kmath-functions/README.md
+++ b/kmath-functions/README.md
@@ -2,15 +2,16 @@
 
 Functions and interpolations.
 
- - [piecewise](Piecewise functions.) : src/commonMain/kotlin/space/kscience/kmath/functions/Piecewise.kt
- - [polynomials](Polynomial functions.) : src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt
- - [linear interpolation](Linear XY interpolator.) : src/commonMain/kotlin/space/kscience/kmath/interpolation/LinearInterpolator.kt
- - [spline interpolation](Cubic spline XY interpolator.) : src/commonMain/kotlin/space/kscience/kmath/interpolation/SplineInterpolator.kt
+ - [piecewise](src/commonMain/kotlin/space/kscience/kmath/functions/Piecewise.kt) : Piecewise functions.
+ - [polynomials](src/commonMain/kotlin/space/kscience/kmath/functions/Polynomial.kt) : Polynomial functions.
+ - [linear interpolation](src/commonMain/kotlin/space/kscience/kmath/interpolation/LinearInterpolator.kt) : Linear XY interpolator.
+ - [spline interpolation](src/commonMain/kotlin/space/kscience/kmath/interpolation/SplineInterpolator.kt) : Cubic spline XY interpolator.
+ - [integration](#) : Univariate and multivariate quadratures
 
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-functions:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-functions:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -21,7 +22,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-functions:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-functions:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -33,6 +34,6 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-functions:0.3.0-dev-4")
+    implementation("space.kscience:kmath-functions:0.3.0-dev-6")
 }
 ```
diff --git a/kmath-nd4j/README.md b/kmath-nd4j/README.md
index c8944f1ab..829fe4142 100644
--- a/kmath-nd4j/README.md
+++ b/kmath-nd4j/README.md
@@ -9,7 +9,7 @@ ND4J based implementations of KMath abstractions.
 
 ## Artifact:
 
-The Maven coordinates of this project are `space.kscience:kmath-nd4j:0.3.0-dev-4`.
+The Maven coordinates of this project are `space.kscience:kmath-nd4j:0.3.0-dev-6`.
 
 **Gradle:**
 ```gradle
@@ -20,7 +20,7 @@ repositories {
 }
 
 dependencies {
-    implementation 'space.kscience:kmath-nd4j:0.3.0-dev-4'
+    implementation 'space.kscience:kmath-nd4j:0.3.0-dev-6'
 }
 ```
 **Gradle Kotlin DSL:**
@@ -32,7 +32,7 @@ repositories {
 }
 
 dependencies {
-    implementation("space.kscience:kmath-nd4j:0.3.0-dev-4")
+    implementation("space.kscience:kmath-nd4j:0.3.0-dev-6")
 }
 ```