@article{ChenHuang2018complex,
  title={Decoupling of mixed methods based on generalized Helmholtz decompositions},
  author={Chen, Long and Huang, Xuehai},
  journal={SIAM Journal on Numerical Analysis},
  volume={56},
  number={5},
  pages={2796--2825},
  year={2018},
  publisher={SIAM}
}