Noga Alon Tao Jiang Zevi Miller Dan Pritikin Properly colored subgraphs and rainbow subgraphs in edge-colorings with local constraints. 409-433 2003 23 Random Struct. Algorithms 4 http://dx.doi.org/10.1002/rsa.10102 db/journals/rsa/rsa23.html#AlonJMP03