%0 Journal Article
%A Gary Gordon
%T A \(\beta\) invariant for greedoids and antimatroids
%J The electronic journal of combinatorics
%D 1997
%V 4
%N 1
%U http://geodesic.mathdoc.fr/articles/10.37236/1298/
%R 10.37236/1298
%F 10_37236_1298