Felix Lazebnik Oleg Pikhurko Andrew J. Woldar Maximum number of colorings of (2<i>k, k</i><sup>2</sup>)-graphs. 135-148 2007 56 Journal of Graph Theory 2 http://dx.doi.org/10.1002/jgt.20254 db/journals/jgt/jgt56.html#LazebnikPW07