%0 Journal Article
%A Gardner, B.
%T A Note on (r, λ)-Systems
%J Canadian mathematical bulletin
%D 1977
%P 511-512
%V 20
%N 4
%U http://geodesic.mathdoc.fr/articles/10.4153/CMB-1977-077-5/
%R 10.4153/CMB-1977-077-5
%F 10_4153_CMB_1977_077_5