Rohit Chadha John C. Mitchell Andre Scedrov Vitaly Shmatikov Contract signing, optimism, and advantage. 189-218 2005 64 J. Log. Algebr. Program. 2 http://dx.doi.org/10.1016/j.jlap.2004.09.003 db/journals/jlp/jlp64.html#ChadhaMSS05