Лопатін ВВ, Копей БВ, Копей ІБ. STRATEGY OF SUCKER ROD COLUMN ELEMENTS UPGRADING BASED ON THE THEORY OF MARKOV CHAINS. Number [Internet]. 2019 Feb. 11 [cited 2025 Apr. 8];(2(38):53-6. Available from: https://pvntsh.nung.edu.ua/index.php/number/article/view/35