Ramazanov M. Doctor of Physical and Mathematical Sciences, Professor, Academician of the National Academy of Sciences of the Republic of Kazakhstan S.N. Kharin is 80 years old. M [Internet]. 2019 Mar. 30 [cited 2025 Sep. 7];93(1):160-1. Available from: http://mts.buketov.edu.kz/index.php/mathematics-vestnik/article/view/368