SamsoniyaZ. V., and SamkharadzeI. G. “On Quasiconformal Mappings Corresponding to the Beltrami Equation”. Ukrains’kyi Matematychnyi Zhurnal 51, no. 10 (October 25, 1999): 1391–1397. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4738.