@article{05558412,
title = {Covering space theory for directed topology.},
journal = {Theory and Applications of Categories [electronic only]},
volume = {22},
year = {2009},
pages = {252-268},
zbl = {1181.55014},
language = {en},
url = {http://dml.mathdoc.fr/item/05558412}
}
Goubault, Eric; Haucourt, Emmanuel; Krishnan, Sanjeevi. Covering space theory for directed topology.. Theory and Applications of Categories [electronic only], Tome 22 (2009) pp. 252-268. http://gdmltest.u-ga.fr/item/05558412/