Ghazaryan, Haik, and Vachagan Margaryan. “On Smooth Solutions of a Class of Almost Hypoelliptic Equations of Constant Strength”. Eurasian Mathematical Journal 10, no. 4 (May 29, 2024). Accessed November 19, 2024. https://emj.enu.kz/index.php/main/article/view/167.