%0 Journal Article %A John Brevik %A Scott Nollet %T Picard groups of normal surfaces %J Journal of Singularities %D 2012 %P 154-170 %V 4 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.5427/jsing.2012.4i/ %R 10.5427/jsing.2012.4i %F 10_5427_jsing_2012_4i