Guantao Chen Laura Sheppardson Xingxing Yu Wenan Zang The circumference of a graph with no K<sub>3, t</sub>-minor. 822-845 2006 96 J. Comb. Theory, Ser. B 6 http://dx.doi.org/10.1016/j.jctb.2006.02.006 db/journals/jct/jctb96.html#ChenSYZ06