diff --git a/core-groovy-strings/README.md b/core-groovy-strings/README.md
new file mode 100644
index 0000000000..2f49f47cf9
--- /dev/null
+++ b/core-groovy-strings/README.md
@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [How to Remove a Prefix From Strings in Groovy](https://www.baeldung.com/groovy-remove-string-prefix)
diff --git a/core-java-modules/core-java-lang-oop-methods/README.md b/core-java-modules/core-java-lang-oop-methods/README.md
index afceaded9a..43eab24003 100644
--- a/core-java-modules/core-java-lang-oop-methods/README.md
+++ b/core-java-modules/core-java-lang-oop-methods/README.md
@@ -9,3 +9,4 @@ This module contains articles about methods in Java
 - [Java equals() and hashCode() Contracts](https://www.baeldung.com/java-equals-hashcode-contracts)
 - [Guide to hashCode() in Java](https://www.baeldung.com/java-hashcode)
 - [The Covariant Return Type in Java](https://www.baeldung.com/java-covariant-return-type)
+- [Does a Method’s Signature Include the Return Type in Java?](https://www.baeldung.com/java-method-signature-return-type)
diff --git a/core-java-modules/core-java-networking-2/README.md b/core-java-modules/core-java-networking-2/README.md
index dbda8bdc7c..fa49c35bf8 100644
--- a/core-java-modules/core-java-networking-2/README.md
+++ b/core-java-modules/core-java-networking-2/README.md
@@ -13,4 +13,5 @@ This module contains articles about networking in Java
 - [Download a File from an URL in Java](https://www.baeldung.com/java-download-file)
 - [Handling java.net.ConnectException](https://www.baeldung.com/java-net-connectexception)
 - [Getting MAC addresses in Java](https://www.baeldung.com/java-mac-address)
+- [Sending Emails with Attachments in Java](https://www.baeldung.com/java-send-emails-attachments)
 - [[<-- Prev]](/core-java-modules/core-java-networking)
diff --git a/core-java-modules/core-java-reflection-2/README.md b/core-java-modules/core-java-reflection-2/README.md
index e5ddb7a8b8..1668eeade3 100644
--- a/core-java-modules/core-java-reflection-2/README.md
+++ b/core-java-modules/core-java-reflection-2/README.md
@@ -2,3 +2,4 @@
 
 - [Reading the Value of ‘private’ Fields from a Different Class in Java](https://www.baeldung.com/java-reflection-read-private-field-value)
 - [Set Field Value With Reflection](https://www.baeldung.com/java-set-private-field-value)
+- [Checking If a Method is Static Using Reflection in Java](https://www.baeldung.com/java-check-method-is-static)
diff --git a/java-collections-conversions-2/README.md b/java-collections-conversions-2/README.md
index 9d0ba88cbf..628421b0e2 100644
--- a/java-collections-conversions-2/README.md
+++ b/java-collections-conversions-2/README.md
@@ -7,4 +7,5 @@ This module contains articles about conversions among Collection types and array
 - [Array to String Conversions](https://www.baeldung.com/java-array-to-string)
 - [Mapping Lists with ModelMapper](https://www.baeldung.com/java-modelmapper-lists)
 - [Converting List to Map With a Custom Supplier](https://www.baeldung.com/list-to-map-supplier)
+- [Arrays.asList vs new ArrayList(Arrays.asList())](https://www.baeldung.com/java-arrays-aslist-vs-new-arraylist)
 - More articles: [[<-- prev]](../java-collections-conversions)
diff --git a/json/README.md b/json/README.md
index 0e50dcfddb..6ad4c8a29d 100644
--- a/json/README.md
+++ b/json/README.md
@@ -13,3 +13,4 @@ This module contains articles about JSON.
 - [Get a Value by Key in a JSONArray](https://www.baeldung.com/java-jsonarray-get-value-by-key)
 - [Iterating Over an Instance of org.json.JSONObject](https://www.baeldung.com/jsonobject-iteration)
 - [Escape JSON String in Java](https://www.baeldung.com/java-json-escaping)
+- [Reducing JSON Data Size](https://www.baeldung.com/json-reduce-data-size)
diff --git a/spring-boot-modules/spring-boot-mvc-3/README.md b/spring-boot-modules/spring-boot-mvc-3/README.md
index 6627bd8eea..796ab72425 100644
--- a/spring-boot-modules/spring-boot-mvc-3/README.md
+++ b/spring-boot-modules/spring-boot-mvc-3/README.md
@@ -7,4 +7,5 @@ This module contains articles about Spring Web MVC in Spring Boot projects.
 - [Circular View Path Error](https://www.baeldung.com/spring-circular-view-path-error)
 - [Download an Image or a File with Spring MVC](https://www.baeldung.com/spring-controller-return-image-file)
 - [Spring MVC Async vs Spring WebFlux](https://www.baeldung.com/spring-mvc-async-vs-webflux)
+- [Differences in @Valid and @Validated Annotations in Spring](https://www.baeldung.com/spring-valid-vs-validated)
 - More articles: [[prev -->]](/spring-boot-modules/spring-boot-mvc-2)
diff --git a/testing-modules/testing-libraries-2/README.md b/testing-modules/testing-libraries-2/README.md
new file mode 100644
index 0000000000..3325600b5e
--- /dev/null
+++ b/testing-modules/testing-libraries-2/README.md
@@ -0,0 +1,3 @@
+### Relevant Articles:
+
+- [Guide to the System Rules Library](https://www.baeldung.com/java-system-rules-junit)