DzyubaM. V., NesmelovaO. V. and ChuikoS. M. (2018) “Least-squares method in the theory of matrix differential-algebraic boundary-value problems”, Ukrains’kyi Matematychnyi Zhurnal, 70(2), pp. 280-292. Available at: http://umj.imath.kiev.ua/index.php/umj/article/view/1556 (Accessed: 25November2020).