%0 Journal Article
%A Rotman, B.
%T A note on principal sequences
%J Glasgow mathematical journal
%D 1964
%P 133-135
%V 6
%N 3
%U http://geodesic.mathdoc.fr/articles/10.1017/S2040618500034894/
%R 10.1017/S2040618500034894
%F 10_1017_S2040618500034894