%0 Journal Article
%A Brainerd, Barron
%T On Birkhoff's Problem 73 For Monoids
%J Canadian mathematical bulletin
%D 1960
%P 217-220
%V 3
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1960-026-3/
%R 10.4153/CMB-1960-026-3
%F 10_4153_CMB_1960_026_3