https://svpressa.ru/all/article/36703/
https://en.wikipedia.org/wiki/Sokolniki_Arena
https://hfboards.mandatory.com/threads/the-sokolniki-tragedy-1975.2135019/
https://news.google.com/newspapers?nid=Fr8DH2VBP9sC&dat=19750313&printsec=frontpage&hl=fr