TY  - JOUR
AU  - Michael E. Hoffman
TI  - An analogue of covering space theory for ranked posets
JO  - The electronic journal of combinatorics
PY  - 2001
VL  - 8
IS  - 1
UR  - http://geodesic.mathdoc.fr/articles/10.37236/1576/
DO  - 10.37236/1576
ID  - 10_37236_1576
ER  -