update description

Author: Jhsmit

DESCRIPTION.rst

@@ -3,9 +3,11 @@ PyHDX is software tool to derive Derive ΔG for single residues from HDX-MS data
 It can be used in scripts/jupyter notebooks or accessed through a web interface.
 
 `bioRxiv Paper`_
+`Analytical Chemistry Paper`_
 `GitHub page`_
 `Documentation`_
 
 .. _bioRxiv Paper: https://doi.org/10.1101/2020.09.30.320887
+.. _Analytical Chemistry Paper: https://doi.org/10.1021/acs.analchem.1c02155
 .. _GitHub page: https://github.com/Jhsmit/PyHDX
 .. _Documentation: https://pyhdx.readthedocs.io/en/latest/