@article{1077467621,
author = {Lee, C. N.},
title = {Covering spaces and simple connectedness},
journal = {Duke Math. J.},
volume = {24},
number = {1},
year = {1957},
pages = { 547-554},
language = {en},
url = {http://dml.mathdoc.fr/item/1077467621}
}
Lee, C. N. Covering spaces and simple connectedness. Duke Math. J., Tome 24 (1957) no. 1, pp. 547-554. http://gdmltest.u-ga.fr/item/1077467621/