@article{RM_1973_28_5_a24,
     author = {G. I. \`Eskin},
     title = {The variation-difference method of solution of elliptic pseudodifferential equations},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {28},
     number = {5},
     year = {1973},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1973_28_5_a24/}
}