1. Some forbidden subgraph conditions for a graph to have a k-contractible edge;Ando;Discrete Math.,2003
2. Contractible edges in minimally k-connected graphs;Ando;SUT J. Math.,2000
3. On Steinitz's theorem concerning convex 3-polytopes and some properties of planar graph, many facets of graph theory;Barnette,1966
4. Graph Theory with Applications;Bondy,1966
5. Minimally 3-connected graphs;Dawes;J. Combin. Theory Ser. B,1986