SARKAR, T. . What Do You Mean By a Solution to an Operator Equation?. Applied Computational Electromagnetics Society Journal (ACES), [S. l.], v. 4, n. 3, p. 161–76, 2022. Disponível em: https://journals.riverpublishers.com/index.php/ACES/article/view/17869. Acesso em: 13 may. 2026.