%0 Journal Article
%A Michael E. Hoffman
%T An analogue of covering space theory for ranked posets
%J The electronic journal of combinatorics
%D 2001
%V 8
%N 1
%U http://geodesic.mathdoc.fr/articles/10.37236/1576/
%R 10.37236/1576
%F 10_37236_1576