Publication in main readme

README.md

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 eppic
 =====
 
-EPPIC is a software package for the analysis of interfaces present in protein crystal structures. It uses mainly evolutionary criteria to try to assess whether interfaces are biologically relevant or simply crystal contacts.
+EPPIC is a software package for the analysis of interfaces in protein crystal structures and for quaternary structure prediction. It uses mainly evolutionary criteria to assess whether interfaces are biologically relevant or simply crystal contacts. The pairwise interface scores are then analysed together to predict the likely oligomeric structure.
+
+If you use this software for your research, please cite:
+
+> Bliven S, Lafita A, Parker A, Capitani G, Duarte JM (2018) 
+> Automated evaluation of quaternary structures from protein crystals. 
+> PLoS Comput Biol 14(4): e1006104. https://doi.org/10.1371/journal.pcbi.1006104 
+>
+> http://journals.plos.org/ploscompbiol/article?id=10.1371/journal.pcbi.1006104
+
+The software is released under the GNU General Public License (GPL).
 
 The software is divided into submodules: 
 * **[eppic-cli](eppic-cli/README.md):** the command line interface