@article{1183537605, author = {Roberts, John}, title = {A sufficient condition for $k$-path Hamiltonian digraphs}, journal = {Bull. Amer. Math. Soc.}, volume = {82}, number = {3}, year = {1976}, pages = { 63-65}, language = {en}, url = {http://dml.mathdoc.fr/item/1183537605} }
Roberts, John. A sufficient condition for $k$-path Hamiltonian digraphs. Bull. Amer. Math. Soc., Tome 82 (1976) no. 3, pp. 63-65. http://gdmltest.u-ga.fr/item/1183537605/