CherskiiYu. I. “Extremum Problem for the Wiener–Hopf Equation”. Ukrains’kyi Matematychnyi Zhurnal 52, no. 8 (August 25, 2000): 1144-1147. Accessed November 24, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/4520.