Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DAN_1971_201_1_a9, author = {I. I. Parovichenko}, title = {Set-theoretic operations}, journal = {Doklady Akademii Nauk}, pages = {40--43}, publisher = {mathdoc}, volume = {201}, number = {1}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1971_201_1_a9/} }
I. I. Parovichenko. Set-theoretic operations. Doklady Akademii Nauk, Tome 201 (1971) no. 1, pp. 40-43. http://geodesic.mathdoc.fr/item/DAN_1971_201_1_a9/