T. V. Rybalkina and V. V. Sergeychuk, “Topological Classification of the Oriented Cycles of Linear Mappings”, Ukr. Mat. Zhurn., vol. 66, no. 10, pp. 1407–1413, Oct. 2014, Accessed: Apr. 16, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/2231