TY - JOUR AU - Eric Goubault AU - Emmanuel Haucourt AU - Sanjeevi Krishnan TI - Covering space theory for directed topology JO - Theory and applications of categories PY - 2009 SP - 252 EP - 268 VL - 22 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/TAC_2009_22_a8/ LA - en ID - TAC_2009_22_a8 ER -