@misc{RM_1996_51_5_a2,
     title = {Joint sessions of the {Petrovskii} {Seminar} on differential equations and related problems and the {Moscow} {Mathematical} {Society.} {In} honour of the 95th anniversary {of~I.\,G.~Petrovskii} (eighteenth session, 25--29 {April~1996)}},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {911--998},
     publisher = {mathdoc},
     volume = {51},
     number = {5},
     year = {1996},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1996_51_5_a2/}
}