Klimyk, A. U., and N. Z. Iorgov. “The Nonstandard Deformation $U’_q(so_n)$ for $q$ a Root of Unity”. Methods of Functional Analysis and Topology 6, no. 3 (September 25, 2000): 56–71. Accessed December 17, 2025. https://zen.imath.kiev.ua/index.php/mfat/article/view/125.