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@article{MS2_1991__68_1_167155, author = {J.H.E. Cohn}, title = {The {Diophantine} equation {X(X} + 1) = {Y(Y...} + 1).}, journal = {Mathematica Scandinavica}, pages = {171--179}, publisher = {mathdoc}, volume = {68}, number = {1}, year = {1991}, language = {en}, url = {http://geodesic.mathdoc.fr/item/MS2_1991__68_1_167155/} }
J.H.E. Cohn. The Diophantine equation X(X + 1) = Y(Y... + 1).. Mathematica Scandinavica, Tome 68 (1991) no. 1, pp. 171-179. http://geodesic.mathdoc.fr/item/MS2_1991__68_1_167155/