Ruichun Yang Zhen Wang Dachuan Xu A Cost-Sharing Method for the Soft-Capacitated Economic Lot-Sizing Game. 166-173 2009 COCOA http://dx.doi.org/10.1007/978-3-642-02026-1_15 conf/cocoa/2009 db/conf/cocoa/cocoa2009.html#YangWX09