Katsala, R.A. and Pahirya, M.M. (2010) “Properties of reciprocal derivatives”, Ukrains’kyi Matematychnyi Zhurnal, 62(5), pp. 708–713. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2902 (Accessed: 14 April 2025).