@article{RM_1965_20_6_a22,
     author = {G. S. Litvinchuk and \`E. G. Khasabov},
     title = {The index of the generalized {Hilbert} boundary value problem},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {20},
     number = {6},
     year = {1965},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1965_20_6_a22/}
}