@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/}
}