Anna Galluccio Claudio Gentile M. Macina Paolo Ventura The k-Gear Composition and the Stable Set Polytope. 251-254 2009 CTW http://www.lix.polytechnique.fr/ctw09/ctw09-proceedings.pdf#page=263 conf/colognetwente/2009 db/conf/colognetwente/colognetwente2009.html#GalluccioGMV09