1. Barnette, D.: Generating the triangulations of the projective plane, J. Comb. Theory 33,222–230(1982)
2. Berge, Theory of Graphs and its applications, Methuen London, 1962
3. Bondy, J.A., Murty, U.S.R.: Graph theory and applications, MacMillan Co, London, 1976
4. Halin, R., Jung, H.A.: Note on isomorphism of grahs, J. London Math. Soc. 42, 254–256 (1967)
5. Hemminger, R.L., Jung, H.A., Kelmans, A.K.: 3-skein isomorphism of graphs, Combinatorica 2(4), 373–376 (1982)