@article{DE_1966_2_4_a12,
     author = {Nguyen Thya Hop},
     title = {A generalized {Green's} matrix for a problem with a directional derivative for a system of elliptic type in several variables},
     journal = {Differencialʹnye uravneni\^a},
     pages = {574--581},
     publisher = {mathdoc},
     volume = {2},
     number = {4},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_4_a12/}
}