@article{aphasetheoryofmimoltisystems,
  title = {A Phase Theory of MIMO LTI Systems},
  author = {Wei Chen and Dan Wang and Sei Zhen Khong and Li Qiu},
  year = {2021},
  eprint = {2105.03630},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2105.03630v2},
}