%0 Journal Article %A Jungnickel, Dieter %T Divisible Semiplanes, Arcs, and Relative Difference Sets %J Canadian journal of mathematics %D 1987 %P 1001-1024 %V 39 %N 4 %U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-051-1/ %R 10.4153/CJM-1987-051-1 %F 10_4153_CJM_1987_051_1