Rashkovskii, A. Yu., and L. I. Ronkin. “Extension and Approximation of Functions Subharmonic in a Half Plane. Impossibility of Extension of Plurisubharmonic Functions”. Ukrains’kyi Matematychnyi Zhurnal 46, no. 8 (August 25, 1994): 1017–1030. Accessed April 27, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/5655.