@article{DE_1998_34_4_a21,
     author = {G. Puryushkis},
     title = {On the {Dirichlet} problem for nonstrongly elliptic systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {570--571},
     publisher = {mathdoc},
     volume = {34},
     number = {4},
     year = {1998},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_4_a21/}
}