V mogografii N.I.Kuznetsova opredelena posledovatel'nost' reformy operno-stsenicheskogo iskusstva v Rossii kontsa KhIKh - nachala KhKh vekov. Opernaya reforma okhvatila otrezok vremeni bolee chem v polveka - s 1885 po 1938 god i razdelena avtorom na tri perioda: I-y - Mamontovskiy (v Russkoy chastnoy opere) - s 1885 po 1899 god, II-y - Shalyapinskiy (v Imperatorskikh: Bol'shom i Mariinskom teatrakh) - s 1899 po 1922 god, III-y - operno-studiynyy Stanislavskogo - s 1918 po 1938 god. V monografii vosstanovlena istoricheskaya spravedlivost' po otnosheniyu k S.I.Mamontovu kak k pervomu reformatoru operno-stsenicheskogo iskusstva v Rossii, pervomu rezhisseru-postanovshchiku muzykal'nykh spektakley i pedagogu dvukh velikikh deyateley stseny - Stanislavskogo i Shalyapina. Vpervye zatronuto znachenie prodolzheniya reformatorskoy deyatel'nosti F.I.Shalyapina v Imperatorskikh teatrakh kak rezhissera i teoretika. Vosstanovlena istina uchastiya K.S. Stanislavkogo v reformatorskoy deyatel'nosti opernogo teatra kak prodolzhatelya nachinaniy Mamontova i Shalyapina.