@article{1102946318,
author = {Hickerson, Dean R.},
title = {Length of period simple continued fraction expansion of $\surd d$.},
journal = {Pacific J. Math.},
volume = {49},
number = {2},
year = {1973},
pages = { 429-432},
language = {en},
url = {http://dml.mathdoc.fr/item/1102946318}
}
Hickerson, Dean R. Length of period simple continued fraction expansion of $\surd d$.. Pacific J. Math., Tome 49 (1973) no. 2, pp. 429-432. http://gdmltest.u-ga.fr/item/1102946318/