Masal’tsevL. A. (2003) “Harmonic Properties of Gauss Mappings in $H^3$”, Ukrains’kyi Matematychnyi Zhurnal, 55(4), pp. 489-499. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/3922 (Accessed: 27July2024).