ENCODING has been replaced by BIBTEX_INPUT_ENCODING and OUTPUT_ENCODING
@article{pappa2014experimental, Author = {Pappa, Anna and Jouguet, Paul and Lawson, Thomas and Chailloux, André and Legré, Matthieu and Trinkler, Patrick and Kerenidis, Iordanis and Diamanti, Eleni}, Date-Added = {2016-02-01 19:45:18 +0000}, Date-Modified = {2016-02-01 19:45:18 +0000}, Journal = {Nature communications}, Publisher = {Nature Publishing Group}, Title = {Experimental plug and play quantum coin flipping}, Volume = {5}, Year = {2014}}