Voir la notice de l'article provenant de la source European Digital Mathematics Library
@article{PORMA_1991__48_4_115770, author = {Ribenboim, P. and McDaniel, W.L.}, title = {Square classes of {Lucas} sequences}, journal = {Portugaliae mathematica}, pages = {469--473}, publisher = {mathdoc}, volume = {48}, number = {4}, year = {1991}, mrnumber = {1147611}, zbl = {0760.11005}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_1991__48_4_115770/} }
Ribenboim, P.; McDaniel, W.L. Square classes of Lucas sequences. Portugaliae mathematica, Tome 48 (1991) no. 4, pp. 469-473. http://geodesic.mathdoc.fr/item/PORMA_1991__48_4_115770/