Voir la notice de l'article provenant de la source Math-Net.Ru
@article{DE_1969_5_12_a13, author = {V. N. Laptinskii}, title = {A method of imaginary quadratures}, journal = {Differencialʹnye uravneni\^a}, pages = {2269--2271}, publisher = {mathdoc}, volume = {5}, number = {12}, year = {1969}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DE_1969_5_12_a13/} }
V. N. Laptinskii. A method of imaginary quadratures. Differencialʹnye uravneniâ, Tome 5 (1969) no. 12, pp. 2269-2271. http://geodesic.mathdoc.fr/item/DE_1969_5_12_a13/