Galba, E. F., V. S. Deineka, and I. V. Sergienko. “Expansion of Weighted Pseudoinverse Matrices in Matrix Power Products”. Ukrains’kyi Matematychnyi Zhurnal 56, no. 11 (November 25, 2004): 1539-1556. Accessed May 3, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/3864.