Lopushanskaya, G. P. “Generalized Boundary Values of the Solutions of Semilinear Elliptic Equations from Weighted Functional Spaces”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 61, no. 4, Apr. 2009, pp. 472-93, https://umj.imath.kiev.ua/index.php/umj/article/view/3035.