Barr, Michael; Diaconescu, Radu
On locally simply connected toposes and their fundamental groups
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 22 (1981) no. 3 , p. 301-314
Zbl 0472.18002 | MR 649078
URL stable : http://www.numdam.org/item?id=CTGDC_1981__22_3_301_0

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