@article{01220852, title = {Perfect squares in the sequence }, journal = {Portugaliae Mathematica. Nova S\'erie}, volume = {55}, year = {1998}, pages = {349-353}, zbl = {0912.11006}, language = {en}, url = {http://dml.mathdoc.fr/item/01220852} }
McDaniel, Wayne L. Perfect squares in the sequence . Portugaliae Mathematica. Nova Série, Tome 55 (1998) pp. 349-353. http://gdmltest.u-ga.fr/item/01220852/