diff --git a/source/py_tutorials/py_ml/py_knn/py_knn_understanding/py_knn_understanding.rst b/source/py_tutorials/py_ml/py_knn/py_knn_understanding/py_knn_understanding.rst
index 040a5b5..ebde009 100644
--- a/source/py_tutorials/py_ml/py_knn/py_knn_understanding/py_knn_understanding.rst
+++ b/source/py_tutorials/py_ml/py_knn/py_knn_understanding/py_knn_understanding.rst
@@ -115,7 +115,6 @@ If you have large number of data, you can just pass it as array. Corresponding r
 Additional Resources
 ======================
 
-#. `NPTEL notes on Pattern Recognition, Chapter 11 <http://www.nptel.iitm.ac.in/courses/106108057/12>`_
 
 Exercises
 ===========