%0 Journal Article
%A Vranch, J.
%T On Critical r, λ-Systems
%J Canadian mathematical bulletin
%D 1976
%P 217-220
%V 19
%N 2
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1976-034-2/
%R 10.4153/CMB-1976-034-2
%F 10_4153_CMB_1976_034_2