@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/