@article{RM_1964_19_4_a20,
     author = {Z. G. Sheftel},
     title = {Solvability in~$L_p$ and classical solubility of the of general boundary value problems for elliptic equations with discontinuous coefficients},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {19},
     number = {4},
     year = {1964},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1964_19_4_a20/}
}