@article{DE_1985_21_11_a15,
     author = {I. E. Pleshchinskaya},
     title = {Boundary control in the {Dirichlet} problem for linear elliptic systems of first-order differential equations},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1978--1988},
     publisher = {mathdoc},
     volume = {21},
     number = {11},
     year = {1985},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1985_21_11_a15/}
}