Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1971_7_2_a19, author = {N. N. Ladis}, title = {Sets of bilateral attraction}, journal = {Differencialʹnye uravneni\^a}, pages = {365--367}, publisher = {mathdoc}, volume = {7}, number = {2}, year = {1971}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1971_7_2_a19/} }
N. N. Ladis. Sets of bilateral attraction. Differencialʹnye uravneniâ, Tome 7 (1971) no. 2, pp. 365-367. http://geodesic.mathdoc.fr/item/DE_1971_7_2_a19/