Fluctuating asymmetry of silver birch Betula pendula Roth in industrial and recreational zones of the South-West of St. PetersburgGrigorii Kozlov, Mikhail Pushkarev, Anastasia Trubnikova, Anastasia Goreva, Miroslava Ivanova and Natalia FedorovaE3S Web of Conf., 215 (2020) 03002DOI: https://doi.org/10.1051/e3sconf/202021503002