Bounded solutions of a second order differential equation with piecewise constant operator coefficients. Neliniini Kolyvannya, [S. l.], v. 26, n. 3, p. 342–349, 2023. DOI: 10.3842/nosc.v26i3.1436. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1108. Acesso em: 21 jan. 2026.