%0 Journal Article %A Mollin, R. A. %T Necessary and Sufficient Conditions for the Central Norm to Equal 2h in the Simple Continued Fraction Expansion of $\sqrt{{{2}^{h}}c}$ %J Canadian mathematical bulletin %D 2005 %P 121-132 %V 48 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2005-011-0/ %R 10.4153/CMB-2005-011-0 %F 10_4153_CMB_2005_011_0