Polovickiy Яков Давидович. “The Perm Algebraic School of S.N. Chernikov and Its Predecessors”. BULLETIN OF PERM UNIVERSITY. MATHEMATICS. MECHANICS. COMPUTER SCIENCE, no. 3 (54) (October 30, 2021). Accessed December 13, 2025. https://press.psu.ru/index.php/Math/article/view/4942.