Voir la notice de l'article provenant de la source Math-Net.Ru
@misc{DE_1990_26_5_a0, title = {Nikola{\v\i} {Pavlovich} {Erugin}}, journal = {Differencialʹnye uravneni\^a}, pages = {739--740}, publisher = {mathdoc}, volume = {26}, number = {5}, year = {1990}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1990_26_5_a0/} }
Nikola{\v\i} Pavlovich Erugin. Differencialʹnye uravneniâ, Tome 26 (1990) no. 5, pp. 739-740. http://geodesic.mathdoc.fr/item/DE_1990_26_5_a0/