Gramain, André
Le théorème de Van Kampen
Cahiers de Topologie et Géométrie Différentielle Catégoriques, Tome 33 (1992) no. 3 , p. 237-251
Zbl 0856.57001 | MR 1186948
URL stable : http://www.numdam.org/item?id=CTGDC_1992__33_3_237_0

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