KATSALA, R. A.; PAHIRYA, M. M. Properties of reciprocal derivatives. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 62, n. 5, p. 708–713, 2010. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2902. Acesso em: 14 apr. 2025.