@article{SD_1971-1972__25_2_A1_0,
     author = {Almeida Costa, Antonio},
     title = {Les $\mu $-demi-anneaux},
     journal = {S\'eminaire Albert Ch\^atelet et Paul Dubreil},
     note = {talk:J1},
     pages = {J1--J9},
     year = {1971-1972},
     publisher = {Secr\'etariat math\'ematique},
     volume = {25},
     number = {2},
     zbl = {0324.16027},
     language = {fr},
     url = {https://www.numdam.org/item/SD_1971-1972__25_2_A1_0/}
}