RashkovskiiA. Yu., and RonkinL. I. 1994. “Extension and Approximation of Functions Subharmonic in a Half Plane. Impossibility of Extension of Plurisubharmonic Functions”. Ukrains’kyi Matematychnyi Zhurnal 46 (8), 1017–1030. https://umj.imath.kiev.ua/index.php/umj/article/view/5655.