Update README.md; add article reference

README.md

@@ -150,3 +150,8 @@ You need to run your R session as an administrator (via the terminal use sudo).
 Error in saveWidget: Saving a widget with selfcontained = TRUE requires pandoc.
 ```
 In this case, please install pandoc on your PC.
+
+# Citation
+
+If you have used this pipeline for your publication, please cite it:
+https://doi.org/10.1186/s12859-020-03921-8