Saransk

NosonovArturModestovichNational Research Mordovia State University, 68 Bolshevistskaya St., Saransk 430005, Russiaartno@mail.ru

YamashkinStanislavAnatolievichNational Research Mordovia State University, 68 Bolshevistskaya St., Saransk 430005, Russiayamashkinsa@mail.ru

YamashkinAnatolyAlexandrovichNational Research Mordovia State University, 68 Bolshevistskaya St., Saransk 430005, Russiayamashkin56@mail.ru

KlikunovAndreyAleksandrovichMordovskiy State University, department of geocology and landscape planning, Str. Bolshevistskaya, 68, Saransk, Republic of Mordovia, 430005a.klikunov@gmail.ru