Streltsova T.A. Natural virus-free Grounds of the Altai mountains as longevity’s bioresource of valuable varieties and problems of potato degeneration: Al-Farabi Kazakh National University, Almaty, Kazakhstan. EJE. 2018;46(1):214-221. Accessed July 17, 2026. https://bulletin-ecology.kaznu.kz/index.php/1-eco/article/view/862