DZYUBA, M. V.; NESMELOVA, O. V.; CHUIKO, S. M. Least-squares method in the theory of matrix differential-algebraic boundary-value problems. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 70, n. 2, p. 280–292, 2018. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/1556. Acesso em: 14 apr. 2025.