%0 Journal Article
%A Piper, Fred
%T On relative difference sets and projective planes
%J Glasgow mathematical journal
%D 1974
%P 150-154
%V 15
%N 2
%U http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002329/
%R 10.1017/S0017089500002329
%F 10_1017_S0017089500002329