Nasimovich Yuri A. Kostina Marina V. Vasilieva Natalia V. The concept of species in poplars (genus Populus L., Salicaceae) based on the example of the subgenus Tacamahaca (Spach) Penjkovsky representatives growing in Russia and neighbouring countries
Bobrov Vladimir V. Herpetological research in Russian nature reserves: Current status and perspectives of development