@misc{RM_1976_31_3_a23,
     title = {Sessions of the {Petrovskii} {Seminar} on {Differential} {Equations} and {Mathematical} {Problems} of {Physics}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1976},
     volume = {31},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1976_31_3_a23/}
}