Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{DE_1980_16_10_a24, title = {Giovanni {Sansone}}, journal = {Differencialʹnye uravneni\^a}, pages = {1906--1913}, publisher = {mathdoc}, volume = {16}, number = {10}, year = {1980}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1980_16_10_a24/} }
Giovanni Sansone. Differencialʹnye uravneniâ, Tome 16 (1980) no. 10, pp. 1906-1913. http://geodesic.mathdoc.fr/item/DE_1980_16_10_a24/