@article{SD_1960-1961__14_2_A9_0, author = {Almeida Costa, Antonio}, title = {Sur la th\'eorie g\'en\'erale des demi-anneaux, I}, journal = {S\'eminaire Dubreil. Alg\`ebre et th\'eorie des nombres}, note = {talk:24}, publisher = {Secr\'etariat math\'ematique}, volume = {14}, number = {2}, year = {1960-1961}, zbl = {0135.02801}, language = {fr}, url = {archive.numdam.org/item/SD_1960-1961__14_2_A9_0/} }
Almeida Costa, Antonio. Sur la théorie générale des demi-anneaux, I. Séminaire Dubreil. Algèbre et théorie des nombres, Tome 14 (1960-1961) no. 2, Exposé no. 24, 17 p. http://archive.numdam.org/item/SD_1960-1961__14_2_A9_0/
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