Added biorxiv link

README.md

@@ -193,6 +193,12 @@ The columns are ordered by how the processes are carried out. i.e col 1 is the f
 
 		awk 'FNR==1 && NR!=1 { while (/^#/) getline; } 1 {print}' ./*-error-report.tab > filename.tab
 
+# Citation 
+
+Please cite the following preprint if you use AgrVATE in your research. Thank you!
+
+Raghuram V, Alexander AM, Loo HQ, Petit III RA, Goldberg JB, Read TD, *Species-wide phylogenomics of the Staphylococcus aureus agr operon reveals convergent evolution of frameshift mutations.* **Biorxiv**. (2021), https://doi.org/10.1101/2021.07.29.454156
+
 # Author 
 
 * Vishnu Raghuram