diff --git a/ext-properties/README.md b/ext-properties/README.md
index f2f30db..e251e30 100644
--- a/ext-properties/README.md
+++ b/ext-properties/README.md
@@ -3,3 +3,5 @@
 This project can serve as starting point for Maven and Java based projects using externl properties.
 
 # Links
+
+[Properties File - Maven](https://www.w3schools.io/file/properties-maven-read/)
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