Kinoshita, Takehiko, Yoshitaka Watanabe, and Mitsuhiro T. Nakao. 2022. “On Some Convergence Properties for Finite Element Approximations to the Inverse of Linear Elliptic Operators”. Acta Cybernetica 26 (1), 71-82. https://doi.org/10.14232/actacyb.294906.