diff --git a/README.md b/README.md
index 29a1107..1f66ddd 100644
--- a/README.md
+++ b/README.md
@@ -19,6 +19,7 @@ Scripts to handle CSV files composed by 2 * 8 EMG sensors(left & right) devided
 * Kapre: Keunwoochoi
 * Audio-Classification: seth814
 * DeepLearningForAudioWithPyhton: musikalkemist
+* PyWavelets reference: Gregory R. Lee, Ralf Gommers, Filip Wasilewski, Kai Wohlfahrt, Aaron O’Leary (2019). PyWavelets: A Python package for wavelet analysis. Journal of Open Source Software, 4(36), 1237, https://doi.org/10.21105/joss.01237.
 
 ## Table of Contents