%0 Journal Article
%A Tomkinson, M. J.
%T Prefrattini Subgroups and Cover-Avoidance Properties in U-Groups
%J Canadian journal of mathematics
%D 1975
%P 837-851
%V 27
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1975-091-1/
%R 10.4153/CJM-1975-091-1
%F 10_4153_CJM_1975_091_1