%0 Journal Article %A Drumm, Todd %A Goldman, William %T Crooked planes %J Electronic research announcements of the American Mathematical Society %D 1995 %P 10-17 %V 01 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.1090/S1079-6762-95-01002-X/ %R 10.1090/S1079-6762-95-01002-X %F ERAAMS_1995_01_1_a1