Butuzov V.F.,  Krutitskaya N.Ch.,  Medvedev G.N. Matematicheskiy analiz v voprosakh i zadachakh. Funktsii neskolkikh peremennykh./Butuzov V.F.,  Krutitskaya N.C.,  Medvedev G.N. Mathematical analysis of questions and problems. Functions of several variables. In Russian - landofmagazines.com

TransliterationButuzov V.F., Krutitskaya N.Ch., Medvedev G.N. Matematicheskiy analiz v voprosakh i zadachakh. Funktsii neskolkikh peremennykh.

In EnglishButuzov V.F., Krutitskaya N.C., Medvedev G.N. Mathematical analysis of questions and problems. Functions of several variables. In Russian

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