FEN, F. T.; KARACA, I. Y. Existence of positive solutions for nonlinear third-order $m$-point impulsive boundary value problems on time scales. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 68, n. 3, p. 408–422, 2016. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1848. Acesso em: 5 dec. 2025.