Rashkovskii, A. Y., and L. I. Ronkin. “Extension and Approximation of Functions Subharmonic in a Half Plane. Impossibility of Extension of Plurisubharmonic Functions”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 46, no. 8, Aug. 1994, pp. 1017–1030, https://umj.imath.kiev.ua/index.php/umj/article/view/5655.