Herzberger, J. “Computational Aspects of Some Iterative Methods for Bounding the Inverse of a Matrix”. Anal. Numér. Théor. Approx. 16, no. 1 (February 1, 1987): 41–46. Accessed April 11, 2025. https://ictp.acad.ro/jnaat/journal/article/view/1987-vol16-no1-art6.