PLOTNIKOV, V. A. Quasidifferential equations in semilinear metric spaces. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 50, n. 1, p. 148–153, 1998. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/4980. Acesso em: 5 dec. 2025.