VasilyanskayaV. S., and VolchkovV. V. “Analogs of the Spherical Transform on the Hyperbolic Plane”. Ukrains’kyi Matematychnyi Zhurnal, Vol. 68, no. 4, Apr. 2016, pp. 469-84, https://umj.imath.kiev.ua/index.php/umj/article/view/1853.