MikayelyanG., and HayrapetyanF. “Blaschke Products of Given Quantity Index for a Half-Plane: Blaschke Products of Given Quantity Index for a Half-Plane”. Armenian Journal of Mathematics, vol. 12, no. 2, Apr. 2020, pp. 1-8, http://armjmath.sci.am/index.php/ajm/article/view/311.