@article{DE_1965_1_12_a8,
     author = {M. A. Galakhov},
     title = {Non-classical boundary value problems for symmetric linear systems of partial differential equations of the first order},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1620--1627},
     publisher = {mathdoc},
     volume = {1},
     number = {12},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1965_1_12_a8/}
}