Xia Ai Wei Xu Li-Dan Liao Xiang Wang Optimized parameterized Uzawa methods for solving complex Helmholtz equations. 34-44 2024 164 Comput. Math. Appl. https://doi.org/10.1016/j.camwa.2024.03.032 db/journals/cma/cma164.html#AiXLW24