Georgios Chalkiadakis Edith Elkind Evangelos Markakis Maria Polukarov Nick R. Jennings Cooperative Games with Overlapping Coalitions. 179-216 2010 39 J. Artif. Intell. Res. (JAIR) http://dx.doi.org/10.1613/jair.3075 db/journals/jair/jair39.html#ChalkiadakisEMPJ10