diff --git a/core-java-modules/core-java-lang-4/README.md b/core-java-modules/core-java-lang-4/README.md
index 18bbf43647..562be950c0 100644
--- a/core-java-modules/core-java-lang-4/README.md
+++ b/core-java-modules/core-java-lang-4/README.md
@@ -7,3 +7,4 @@ This module contains articles about core features in the Java language
 - [What are Compile-time Constants in Java?](https://www.baeldung.com/java-compile-time-constants)
 - [Java Objects.hash() vs Objects.hashCode()](https://www.baeldung.com/java-objects-hash-vs-objects-hashcode)
 - [Referencing a Method in Javadoc Comments](https://www.baeldung.com/java-method-in-javadoc)
+- [Tiered Compilation in JVM](https://www.baeldung.com/jvm-tiered-compilation)
diff --git a/core-java-modules/core-java-lang-oop-modifiers/README.md b/core-java-modules/core-java-lang-oop-modifiers/README.md
index eef905fa0e..1f37cc903e 100644
--- a/core-java-modules/core-java-lang-oop-modifiers/README.md
+++ b/core-java-modules/core-java-lang-oop-modifiers/README.md
@@ -9,4 +9,5 @@ This module contains articles about modifiers in Java
 - [The “final” Keyword in Java](https://www.baeldung.com/java-final)
 - [A Guide to the Static Keyword in Java](https://www.baeldung.com/java-static)
 - [Static and Default Methods in Interfaces in Java](https://www.baeldung.com/java-static-default-methods)
-- [The strictfp Keyword in Java](https://www.baeldung.com/java-strictfp)
\ No newline at end of file
+- [The strictfp Keyword in Java](https://www.baeldung.com/java-strictfp)
+- [Static Classes Versus the Singleton Pattern in Java](https://www.baeldung.com/java-static-class-vs-singleton)
diff --git a/core-java-modules/core-java-streams-4/README.md b/core-java-modules/core-java-streams-4/README.md
new file mode 100644
index 0000000000..6eeee943aa
--- /dev/null
+++ b/core-java-modules/core-java-streams-4/README.md
@@ -0,0 +1,3 @@
+## Relevant Articles:
+
+- [Count Occurrences Using Java groupingBy Collector](https://www.baeldung.com/java-groupingby-count)
diff --git a/core-java-modules/core-java-string-conversions-2/README.md b/core-java-modules/core-java-string-conversions-2/README.md
index 3bd3ba927e..229a40f91f 100644
--- a/core-java-modules/core-java-string-conversions-2/README.md
+++ b/core-java-modules/core-java-string-conversions-2/README.md
@@ -7,4 +7,5 @@ This module contains articles about string conversions from/to another type.
 - [Convert String to Byte Array and Reverse in Java](https://www.baeldung.com/java-string-to-byte-array)
 - [Convert Character Array to String in Java](https://www.baeldung.com/java-char-array-to-string)
 - [Converting String to BigDecimal in Java](https://www.baeldung.com/java-string-to-bigdecimal)
+- [Converting String to BigInteger in Java](https://www.baeldung.com/java-string-to-biginteger)
 - More articles: [[<-- prev]](/core-java-string-conversions)
diff --git a/maven-modules/maven-builder-plugin/README.md b/maven-modules/maven-builder-plugin/README.md
new file mode 100644
index 0000000000..47cd99d281
--- /dev/null
+++ b/maven-modules/maven-builder-plugin/README.md
@@ -0,0 +1,3 @@
+## Relevant Articles:
+
+- [Additional Source Directories in Maven](https://www.baeldung.com/maven-add-src-directories)