diff --git a/README b/README
index 15aec92c..138d5bdb 100644
--- a/README
+++ b/README
@@ -7,7 +7,7 @@
 *** Other Contributors: Robert Underwood, Sihuan Li, Ali M. Gok, Xiangyu Zou, Tao Lu, Wen Xia, Xuan Wang, Weizhe Zhang ***
 
 *** Citations ***
-If you mention SZ in your paper, please cite the following references:
+**Kindly note: If you mention SZ in your paper, please cite the following three references, because they cover different versions of SZ completely:**
 
 SZ 0.1-0.15: Sheng Di, Franck Cappello, "Fast Error-bounded Lossy HPC Data Compression with SZ", in IEEE International Parallel and Distributed Processing Symposium (IPDPS 2016), Chicago, IL, USA, 2016.