%0 Journal Article %A Wayne Barrett %A Shaun M. Fallat %A H. Tracy Hall %A Leslie Hogben %T Note on Nordhaus-Gaddum problems for Colin de Verdière type parameters %J The electronic journal of combinatorics %D 2013 %V 20 %N 3 %U http://geodesic.mathdoc.fr/articles/10.37236/2570/ %R 10.37236/2570 %F 10_37236_2570