ENCODING has been replaced by BIBTEX_INPUT_ENCODING and OUTPUT_ENCODING
@inproceedings{MD13, Author = {M. Mahmoody and D. Xiao}, Booktitle = {Proceedings of 10th Theory of Cryptography Conference}, Date-Added = {2014-08-11 09:38:24 +0000}, Date-Modified = {2014-08-11 09:39:32 +0000}, Pages = {297-314}, Title = {Languages with Efficient Zero-Knowledge PCPs are in SZK}, Year = {2013}}