Arnon Ploymukda, and Pattrawut Chansangiam. “Weighted Lim’s Geometric Mean of Positive Invertible Operators on a Hilbert Space”. Journal of Computational Analysis and Applications (JoCAAA) 29, no. 2 (March 13, 2021): 390–400. Accessed September 1, 2024. http://eudoxuspress.com/index.php/pub/article/view/158.