Add citation to README and doc

README.md

@@ -25,6 +25,10 @@ This README file provides some essential information to install/use PanACoTA. Bu
 - Align all Core/Persistent families
 - Infer a phylogenetic tree from the Core/Persistent families
 
+If you use PanACoTA, please cite:
+
+PERRIN, A., & ROCHA, E. (2020). PanACoTA: A modular tool for massive microbial comparative genomics. BioRxiv. https://doi.org/10.1101/2020.09.11.293472
+
 
 # Installation
 

doc/source/index.rst

@@ -5,7 +5,8 @@ Welcome to PanACoTA's documentation!
 
 If you use PanACoTA, please cite:
 
-XXXXXXXXX
+PERRIN, A., & ROCHA, E. (2020). PanACoTA: A modular tool for massive microbial comparative genomics. BioRxiv. https://doi.org/10.1101/2020.09.11.293472
+
 
 
 .. toctree::