Valentin Goranko Dmitry Shkatov Tableau-Based Procedure for Deciding Satisfiability in the Full Coalitional Multiagent Epistemic Logic. 197-213 2009 LFCS http://dx.doi.org/10.1007/978-3-540-92687-0_14 conf/lfcs/2009 db/conf/lfcs/lfcs2009.html#GorankoS09