Wikipedia:Articles for deletion/Ivan Pervushin
The Russian Wikipedia article has convincing sources for  (in two Russian-language print encyclopedias, but sources don't need to be in English). I also found what appears to be a journal article about him, but only by reference (I haven't found the article itself): A. E. Raik. Ural'skii matematik Ivan Mikheevich Pervushin. ''Istoriko-Matematicheskie Issledovaniya'' 6 (1953). 535-572
— User:David, 21:39, 15 May 2016 (UTC)
Stance: keep
Cited policy: WP:GNG (Wikipedia:Notability)