RETRACTED: Lead and zink in permafrost forest-steppe soils Erzhena Chimitdorzhieva, Tsypilma Korsunova, Ayuna Nimbueva, Galina Chimitdorzhieva and Nimbu Baldanov E3S Web Conf., 420 (2023) 03001 Published online: 04 September 2023 DOI: 10.1051/e3sconf/202342003001