Multilevel space-time block diagonal preconditioners for parabolic problems. - Xinping Shao; Ruyi Zhang 004; Shishun Li (Appl. Math. Lett., 2020)

Parallel multiplicative Schwarz preconditioner for solving nonselfadjoint elliptic problems. - Ruyi Zhang 004; Shishun Li (Int. J. Comput. Math., 2021)