added paper preprint link to readme

Author: ndaniels

main.pdf

@@ -384,7 +384,8 @@ \subsection{User-Defined Tags}\label{user-defined}
 
 \section{Further Reading}{
     The official source for the medford parser is on GitHub at \url{https://github.com/TuftsBCB/medford}.
-    Additionally, there is a repository of example MEDFORD files on GitHub at \url{https://github.com/TuftsBCB/MEDFORD-examples/}
+    Additionally, there is a repository of example MEDFORD files on GitHub at \url{https://github.com/TuftsBCB/MEDFORD-examples/}.
+    Finally, a preprint of the MEDFORD paper is on the arXiv at \url{https://arxiv.org/abs/2204.09610}
 }
 
 \section{Acknowledgements}{LC and PS thank the NSF for support under grant OAC-1939263. We thank Hollie Putnam, Jane Greenberg, Jack Freeman, Jay-Miguel Fonticella, and the entire Tufts BCB group for helpful feedback.}