TROHIMCHUK, Yu. Yu. Total differential. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 69, n. 9, p. 1250–1256, 2017. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1775. Acesso em: 5 dec. 2025.