%0 Journal Article %A Matthews, Keith R. %T Unisequences and nearest integer continued fraction midpoint criteria for Pell's equation %J Journal of integer sequences %D 2009 %V 12 %N 6 %I mathdoc %U http://geodesic.mathdoc.fr/item/JIS_2009__12_6_a7/ %G en %F JIS_2009__12_6_a7