GalbaE. F., DeinekaV. S., and SergienkoI. V. “Necessary and Sufficient Conditions for the Existence of Weighted Singular-Valued Decompositions of Matrices With Singular Weights”. Ukrains’kyi Matematychnyi Zhurnal 67, no. 3 (March 25, 2015): 406–426. Accessed December 4, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/1992.