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2. Hamiltonian Lines in Cubic Graphs;Bosák,1967
3. On the chromatic index of a graph III. Uniquely edge-colourable graphs;Fiorini;Quart. J. Math. Oxford Ser.,1975
4. Uniquely line-colorable graphs;Greenwell;Can. Math. Bull.,1973
5. An estimate of the number of Hamiltonian cycles in a multigraph;Ninčák,1975