Ghazaryan, Haik, and Vachagan Margaryan. “On Increase at Infinity of Almost Hypoelliptic Polynomials”. Eurasian Mathematical Journal 4, no. 4 (December 30, 2013): 30–42. Accessed August 3, 2025. https://emj.enu.kz/index.php/main/article/view/555.