A. A. Mozgova, “On Homotopic Equivalence of Fibering into Tori and Total Space. Case of Nonempty Boundary”, Ukr. Mat. Zhurn., vol. 54, no. 2, pp. 237–248, Feb. 2002, Accessed: Apr. 07, 2025. [Online]. Available: https://umj.imath.kiev.ua/index.php/umj/article/view/4059