%0 Journal Article
%A Broughan, K. A.
%T On the Number of Structures of Reflexive and Transitive Relations
%J Canadian journal of mathematics
%D 1973
%P 1269-1273
%V 25
%N 6
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1973-133-9/
%R 10.4153/CJM-1973-133-9
%F 10_4153_CJM_1973_133_9