@article{DE_1986_22_4_a8,
     author = {M. A. Abdrachmanov},
     title = {$L_2$-estimates for the solution of a problem for a system of equations of mixed type in a bounded domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {629--640},
     publisher = {mathdoc},
     volume = {22},
     number = {4},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_4_a8/}
}