@article{1183492188, author = {Ward, Morgan}, title = {A generalization of recurrents}, journal = {Bull. Amer. Math. Soc.}, volume = {33}, number = {6}, year = {1927}, pages = { 477-492}, language = {en}, url = {http://dml.mathdoc.fr/item/1183492188} }
Ward, Morgan. A generalization of recurrents. Bull. Amer. Math. Soc., Tome 33 (1927) no. 6, pp. 477-492. http://gdmltest.u-ga.fr/item/1183492188/