Voir la notice de l'article provenant de la source Math-Net.Ru
@article{AL_1990_29_2_a7, author = {V. L. Selivanov}, title = {Index sets of classes of hyperhypersimple sets}, journal = {Algebra i logika}, pages = {220--240}, publisher = {mathdoc}, volume = {29}, number = {2}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/AL_1990_29_2_a7/} }
V. L. Selivanov. Index sets of classes of hyperhypersimple sets. Algebra i logika, Tome 29 (1990) no. 2, pp. 220-240. http://geodesic.mathdoc.fr/item/AL_1990_29_2_a7/