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https://ru.krymr.com/a/vitaliy-portnikov-navalniy-otravleniye-kreml-putin-nas-tam-net/31015220.html
https://www.radiosvoboda.org/a/news-bellingcat-fsb-inshi-otrujennya/31016003.html
https://www.radiosvoboda.org/a/belanovskyy-navalny-otruyennya-reaktsiya/31014835.html
https://www.thelancet.com/journals/lancet/article/PIIS0140-6736(20)32644-1/fulltext
https://taz.de/Russland-nach-Nawalny-Enthuellung/!5735380/