@article{DE_1966_2_1_a0,
     author = {N. E. Tovmasyan},
     title = {A general boundary value problem for elliptic systems of second order with constant coefficients},
     journal = {Differencialʹnye uravneni\^a},
     pages = {3--23},
     publisher = {mathdoc},
     volume = {2},
     number = {1},
     year = {1966},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1966_2_1_a0/}
}