@article{RM_1973_28_5_a25,
     author = {A. S. Kalashnikov and O. A. Oleinik},
     title = {I. {G.~Petrovskii} {Seminar} on {Differential} {Equations} and the {Mathematical} {Problems} of {Physics}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     year = {1973},
     volume = {28},
     number = {5},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/RM_1973_28_5_a25/}
}