@misc{RM_1978_33_3_a29,
     title = {Joint sessions of the {Petrovskii} {Seminar} on differential equations and mathematical problems of physics and of the {Moscow} {Mathematical} {Society} (second meeting, {18--20~January~1978)}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     publisher = {mathdoc},
     volume = {33},
     number = {3},
     year = {1978},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1978_33_3_a29/}
}