Vittorio Bilò Angelo Fanelli Michele Flammini Luca Moscardelli When Ignorance Helps: Graphical Multicast Cost Sharing Games. 108-119 2008 MFCS http://dx.doi.org/10.1007/978-3-540-85238-4_8 conf/mfcs/2008 db/conf/mfcs/mfcs2008.html#BiloFFM08