Integer Roots Chromatic Polynomials of Non-Chordal Graphs and the Prouhet-Tarry-Escott Problem.

Santos Hernández Florian Luca Integer Roots Chromatic Polynomials of Non-Chordal Graphs and the Prouhet-Tarry-Escott Problem. 319-323 2005 21 Graphs and Combinatorics 3 http://dx.doi.org/10.1007/s00373-005-0617-0 db/journals/gc/gc21.html#HernandezL05