HU, X. .; CHEN, R. .; DING, D. .; FAN, Z. .; XU, Y. . Two-Step Preconditioner of Multilevel Simple Sparse Method for Electromagnetic Scattering Problems. Applied Computational Electromagnetics Society Journal (ACES), [S. l.], v. 27, n. 1, p. 9–21, 2022. Disponível em: https://journals.riverpublishers.com/index.php/ACES/article/view/15095. Acesso em: 13 may. 2026.