1. A. O. Bagapsh, ‘‘On the geometric properties of the Poisson kernel for the Lame equation,’’ Comput. Math. Math. Phys. 59, 2124–2144 (2019).
2. A. O. Bagapsh and K. Yu. Fedorovskiy, ‘‘Uniform and $$C^{1}$$-approximation of functions by solutions of second order elliptic systems on compact sets in $$\mathbb{R}^{2}$$,’’ Proc. Steklov Inst. Math. 298, 35–50 (2017).
3. A. O. Bagapsh and K. Yu. Fedorovskiy, ‘‘$$C^{m}$$-Approximation of functions by solutions of second-order elliptic systems on compact sets in the plane,’’ Proc. Steklov Inst. Math. 301, 1–10 (2018).
4. A. O. Bagapsh, K. Yu. Fedorovskiy, and M. Ya. Mazalov, ‘‘On Dirichlet problem for second-order elliptic equations in the plane and uniform approximation problems for solutions of such equations,’’ arXiv: 2106.00773 [math.CV] (2021).
5. Yu. Belov, A. Borichev, and K. Fedorovskiy, ‘‘Nevanlinna domains with large boundaries,’’ J. Funct. Anal. 277, 2617–2643 (2019).