@article{05688298,
title = {Unisequences and nearest integer continued fraction midpoint criteria for Pell's equation.},
journal = {Journal of Integer Sequences [electronic only]},
volume = {12},
year = {2009},
zbl = {1201.11011},
language = {en},
url = {http://dml.mathdoc.fr/item/05688298}
}
Matthews, Keith R. Unisequences and nearest integer continued fraction midpoint criteria for Pell's equation.. Journal of Integer Sequences [electronic only], Tome 12 (2009) . http://gdmltest.u-ga.fr/item/05688298/