Mozel’, V. A., & Chernetskii, V. A. (2001). Algebra of Bergman Operators with Automorphic Coefficients and Parabolic Group of Shifts. Ukrains’kyi Matematychnyi Zhurnal, 53(9), 1218-1223. https://umj.imath.kiev.ua/index.php/umj/article/view/4340