A. K. M. Libardi and V. V. Sharko, “Functions and Vector Fields on $C(ℂP^N)$-Singular Manifolds”, Ukr. Mat. Zhurn., vol. 66, no. 3, pp. 311–315, Mar. 2014, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2134