Voir la notice de l'article provenant de la source Czech Digital Mathematics Library
@article{ARM_1970__6_4_a2, author = {Stach, Kv\v{e}tomil}, title = {Normalgruppoide einer {Kategorie}}, journal = {Archivum mathematicum}, pages = {213--220}, publisher = {mathdoc}, volume = {06}, number = {4}, year = {1970}, mrnumber = {0320207}, zbl = {0242.18003}, language = {ge}, url = {http://geodesic.mathdoc.fr/item/ARM_1970__6_4_a2/} }
Stach, Květomil. Normalgruppoide einer Kategorie. Archivum mathematicum, Tome 06 (1970) no. 4, pp. 213-220. http://geodesic.mathdoc.fr/item/ARM_1970__6_4_a2/