@article{DE_1967_3_4_a12,
     author = {L. A. Rukhovets},
     title = {A remark on the method of fictitious regions},
     journal = {Differencialʹnye uravneni\^a},
     pages = {698--701},
     year = {1967},
     volume = {3},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_4_a12/}
}