[2] W. S. Petroelje, C. E. Wall:
Graph-valued functions and hamiltonian graphs. Rеcent Trends in Graph Theory (M. Сapobianco, J. B. Ғrechen, and M. Kroíik, eds.), Lecture Notes in Mathematics 186. Ѕpringeг-Verlag, Berlin 1971, pp. 211 - 213.
MR 0281645 |
Zbl 0214.51402