%0 Journal Article
%A Hell, Pavol
%A Rival, Ivan
%T Absolute Retracts and Varieties of Reflexive Graphs
%J Canadian journal of mathematics
%D 1987
%P 544-567
%V 39
%N 3
%U http://geodesic.mathdoc.fr/articles/10.4153/CJM-1987-025-1/
%R 10.4153/CJM-1987-025-1
%F 10_4153_CJM_1987_025_1