KARANDZHULOV, L. I. Structure of the general solutions to boundary-value problems for ordinary differential equations under pulse influence studied by using semireciprocal matrices. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 5, p. 616–625, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5850. Acesso em: 5 dec. 2025.