diff --git a/data_structures/binary_search_tree2.cpp b/data_structures/binary_search_tree2.cpp
index d506de151..55ae3a438 100644
--- a/data_structures/binary_search_tree2.cpp
+++ b/data_structures/binary_search_tree2.cpp
@@ -1,6 +1,7 @@
 /**
  * @file
  * @brief A generic [binary search tree](https://en.wikipedia.org/wiki/Binary_search_tree) implementation.
+ * Here you can find more information about the algorithm: [Scaler - Binary Search tree](https://www.scaler.com/topics/data-structures/binary-search-tree/).
  * @see binary_search_tree.cpp
  */