On the number of 4-contractible edges in 4-connected graphs

Kiyoshi Ando, Yoshimi Egawa, K. Kawarabayashi, Matthias Kriesell. On the number of 4-contractible edges in 4-connected graphs. Journal of Combinatorial Theory, Series A, 99(1):97-109, 2009. [doi]

Abstract

Abstract is missing.