On a special case of Hadwiger's conjecture Michael D. Plummer; Michael Stiebitz; Bjarne Toft — 2003 Discussiones Mathematicae Graph Theory Hadwiger's Conjecture seems difficult to attack, even in the very special case of graphs G of independence number α(G) = 2. We present some results in this special case.
Double-critical graphs and complete minors. Kawarabayashi, Ken-Ichi; Pedersen, Anders Sune; Toft, Bjarne — 2010 The Electronic Journal of Combinatorics [electronic only]