@article{DE_1988_24_3_a3,
     author = {\`E. I. Grudo and P. G. Lasy},
     title = {Determination of the characteristic vectors of functions of several variables and of stability in the first approximation},
     journal = {Differencialʹnye uravneni\^a},
     pages = {389--393},
     publisher = {mathdoc},
     volume = {24},
     number = {3},
     year = {1988},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1988_24_3_a3/}
}