Aleksandr Biryukov
North-Caucasus Federal University, Stavropol
Russia, Federação da

North-Caucasus Federal University, Stavropol, Russia. E-mail: [email protected]. ORCID: https://orcid.org/0000-0001-9892-5404.

Galina Zakharova
North-Caucasus Federal University, Stavropol, Russia
Russia, Federação da

North-Caucasus Federal University, Stavropol, Russia. E-mail: [email protected]. ORCID: https://orcid.org/0000-0002-2316-6279. 

Marina Melnichuk
North-Caucasus Federal University, Stavropol, Russia
Russia, Federação da

North-Caucasus Federal University, Stavropol, Russia. E-mail: [email protected]. ORCID: https://orcid.org/0000-0003-0423-4720.

Victoria Savina
North-Caucasus Federal University, Stavropol, Russia
Russia, Federação da

North-Caucasus Federal University, Stavropol, Russia. Plekhanov Russian University of economics, Moscow, Russia. E-mail: [email protected]. ORCID: https://orcid.org/0000-0002-8385-9421.

Alyona Shevchenko
North-Caucasus Federal University, Stavropol, Russia
Russia, Federação da

North-Caucasus Federal University, Stavropol, Russia. E-mail: [email protected]. ORCID: https://orcid.org/0000-0002-6581-6938