AMIROV, R. Kh. On a System of Dirac Differential Equations with Discontinuity Conditions Inside an Interval. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 57, n. 5, p. 601–613, 2005. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/3626. Acesso em: 5 dec. 2025.