Marios Mavronicolas Burkhard Monien Vicky G. Papadopoulou How Many Attackers Can Selfish Defenders Catch? 470 2008 conf/hicss/2008 HICSS http://doi.ieeecomputersociety.org/10.1109/HICSS.2008.193 db/conf/hicss/hicss2008.html#MavronicolasMP08