Krystof Hoder, Laura Kovács, Andrei Voronkov. Playing in the grey area of proofs. In John Field, Michael Hicks, editors, Proceedings of the 39th ACM SIGPLAN-SIGACT Symposium on Principles of Programming Languages, POPL 2012, Philadelphia, Pennsylvania, USA, January 22-28, 2012. pages 259-272, ACM, 2012. [doi]
Abstract is missing.