@article{DE_1997_33_8_a15,
     author = {A. P. Soldatov and S. P. Mitin},
     title = {On a class of strongly elliptic systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1118--1122},
     publisher = {mathdoc},
     volume = {33},
     number = {8},
     year = {1997},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1997_33_8_a15/}
}