1. F.J. Allan and T. Kameda, A combinatorial problem related to network diagnosis, in preparation.
2. Short proof of Menger's graph theorem;Dirac;C. R. Acad. Sci. Paris,1960
3. A theorem on n-connected graphs;Halin;J. Combinatorial Theory,1969
4. Zur allgemeinen Kurventheorie;Menger;Fund. Math.,1927
5. Congruent graphs and the connectivity of graphs;Whitney;Amer. J. Math.,1932