%0 Journal Article %A Ledet, Arne %T PSL(2, 2n )-Extensions Over %J Canadian mathematical bulletin %D 2006 %P 113-116 %V 49 %N 1 %U http://geodesic.mathdoc.fr/articles/10.4153/CMB-2006-011-6/ %R 10.4153/CMB-2006-011-6 %F 10_4153_CMB_2006_011_6