Two new variants of the HSS preconditioner for regularized saddle point problems

@article{Liang2016TwoNV,
  title={Two new variants of the HSS preconditioner for regularized saddle point problems},
  author={Zhao-Zheng Liang and Guo-Feng Zhang},
  journal={Computers & Mathematics with Applications},
  year={2016},
  volume={72},
  pages={603-619}
}