Integral assessment of heavy metal pollution in Don River estuary soilsDina Nevidomskaya, Tatiana Minkina, Yuri Fedorov, Olga Nazarenko, Natalya Kravtsova and Yuri LitvinovE3S Web Conf., 169 (2020) 01007DOI: https://doi.org/10.1051/e3sconf/202016901007