Egorov D. F. Uravneniya s chastnymi proizvodnymi vtorogo poryadka po dvum nezavisimym peremennym. Obshchaya teoriya integralov, kharakteristiki/D. F. Egorov Equations with second-order partial derivatives on two independent variables. General theory of integrals, characteristics In Russian (ask us if in doubt). - landofmagazines.com

TransliterationEgorov D. F. Uravneniya s chastnymi proizvodnymi vtorogo poryadka po dvum nezavisimym peremennym. Obshchaya teoriya integralov, kharakteristiki

In EnglishD. F. Egorov Equations with second-order partial derivatives on two independent variables. General theory of integrals, characteristics In Russian (ask us if in doubt).

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