M. İşcan and M. Özkan, “On Four-Dimensional Paracomplex Structures with Norden Metrics”, Ukr. Mat. Zhurn., vol. 67, no. 1, pp. 32–41, Jan. 2015, Accessed: Dec. 05, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/1961