%0 Journal Article
%A Johnson, R. H.
%T A new class of enumeration problems
%J Czechoslovak Mathematical Journal
%D 1974
%P 573-583
%V 24
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.1974.101276/
%R 10.21136/CMJ.1974.101276
%G en
%F 10_21136_CMJ_1974_101276