Panin V, Krivoshey F, Bogdan Y. Retrospective task for a non-stationary operator of heat conductivity . Dopov. Nac. akad. nauk Ukr. [Internet]. 2025 Mar. 1 [cited 2026 May 10];(8):72-6. Available from: https://nasu-periodicals.org.ua/index.php/dp/article/view/16614