@article{PPC06:kbo_kra,
	Author = {Eric Pacuit and Rohit Parikh and Eva Cogan},
	Journal = {Knowledge, Rationality and Action: A Subjournal of Synthese},
	Month = {March},
	Number = {2},
	Title = {The Logic of Knowledge Based Obligation},
	Volume = {149},
	Year = {2006}}