%0 Journal Article
%A Frank Forelli
%T Two-sheeted coverings of the disc.
%J Mathematica Scandinavica
%D 1987
%P 17-38
%V 61
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MS2_1987__61_2_186105/
%F MS2_1987__61_2_186105