@article{DE_1980_16_1_a17,
     author = {A. Yanushauskas},
     title = {On the question of the well-posedness of boundary value problems for systems of second-order partial differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {150--160},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {1980},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1980_16_1_a17/}
}