https://www.dw.com/ru/kommentarij-borba-s-anti-rossiej-stala-smyslom-zhizni-putina/a-58263378
http://region.expert/dictionaries/
http://region.expert/siberian-peoples/
http://region.expert/udmurt_culture/
https://www.gazeta.ru/politics/2021/02/28_a_13495280.shtml
http://region.expert/university/
https://lenta.ru/articles/2020/12/30/petroleum/