PrishlyakO. O. (2002) “Topological Equivalence of Morse–Smale Vector Fields with beh2 on Three-Dimensional Manifolds”, Ukrains’kyi Matematychnyi Zhurnal, 54(4), pp. 492-500. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4087 (Accessed: 24November2024).