Gor’kavyiV. A. and NevmerzhitskayaE. N. (2011) “Two-dimensional pseudospherical surfaces with degenerate Bianchi transformation”, Ukrains’kyi Matematychnyi Zhurnal, 63(11), pp. 1460-1468. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2818 (Accessed: 23November2024).