Belyaev Sergey (associate Professor, Petrozavodsk state University)
Davydkov Gennady (associate Professor, Petrozavodsk state University)
Pronina Olga (associate Professor, Petrozavodsk state University)
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Belyaev Sergey (associate Professor, Petrozavodsk state University)
Davydkov Gennady (associate Professor, Petrozavodsk state University)
Pronina Olga (associate Professor, Petrozavodsk state University)
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