@article{DE_1991_27_1_a21,
     author = {V. D. Repnikov},
     title = {Limit relations between solutions of some equations of hyperbolic, parabolic and elliptic types},
     journal = {Differencialʹnye uravneni\^a},
     pages = {165--167},
     publisher = {mathdoc},
     volume = {27},
     number = {1},
     year = {1991},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1991_27_1_a21/}
}