Dzyuba, M. V., Nesmelova, O. V., & Chuiko, S. M. (2018). Least-squares method in the theory of matrix differential-algebraic boundary-value problems. Ukrains’kyi Matematychnyi Zhurnal, 70(2), 280-292. Retrieved from https://umj.imath.kiev.ua/index.php/umj/article/view/1556