Qizhi Fang Rudolf Fleischer Jian Li Xiaoxun Sun Algorithms for Core Stability, Core Largeness, Exactness, and Extendability of Flow Games. 439-447 2007 conf/cocoon/2007 COCOON http://dx.doi.org/10.1007/978-3-540-73545-8_43 db/conf/cocoon/cocoon2007.html#FangFLS07