Kirjackis, J., and E. G. Kiriyatzkii. “On Some Properties of the Operator, Defined on Class of Analytic in the Half-Plane Functions”. Nonlinear Analysis: Modelling and Control 9, no. 2 (April 25, 2004): 117–128. Accessed May 12, 2024. https://www.journals.vu.lt/nonlinear-analysis/article/view/15160.