@article{CTGDC_1981__22_3_301_0,
author = {Barr, Michael and Diaconescu, Radu},
title = {On locally simply connected toposes and their fundamental groups},
journal = {Cahiers de Topologie et G\'eom\'etrie Diff\'erentielle Cat\'egoriques},
volume = {22},
year = {1981},
pages = {301-314},
mrnumber = {649078},
zbl = {0472.18002},
language = {en},
url = {http://dml.mathdoc.fr/item/CTGDC_1981__22_3_301_0}
}
Barr, Michael; Diaconescu, Radu. On locally simply connected toposes and their fundamental groups. Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 22 (1981) pp. 301-314. http://gdmltest.u-ga.fr/item/CTGDC_1981__22_3_301_0/
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