Prishlyak, O. O. (2000) “Conjugacy of Morse Functions on Surfaces with Values on a Straight Line and Circle”, Ukrains’kyi Matematychnyi Zhurnal, 52(10), pp. 1421-1425. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/4547 (Accessed: 18May2024).