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altay state university . kazan university . moscow bauman state technical university . moscow institute of physics and technology . moscow power engineering institute . moscow state university . nizhni novgorod state university . novgorod state university . novosibirsk state technical university . novosibirsk state university . penza state technical university . rostov state university . russian academy of sciences . samara state university . st. petersburg state technical university . st. petersburg university . tomsk state university . university of pereslavl . ural state university .