Dovhopiatyi OP, Sevost’yanov EA. On the existence of solutions of quasilinear Beltrami equations with two characteristics. Ukr. Mat. Zhurn. [Internet]. 2022Aug.9 [cited 2024Apr.18];74(7):961 -972. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/7088