1. Trivalent graphs of girth nine and eleven, and relationships among cages;Balaban;Rev. Roumaine Math. Pures Appl.,1973
2. A trivalent graph with 58 vertices and girth 9;Biggs;Discrete Math.,1980
3. Remarks on finite groups defined by generating relations;Frucht;Canad. J. Math.,1955
4. On classes of graphs defined by special cutsets of lines;Hedetniemi,1969
5. Some problems in permutation graphs;Holton,1975