@article{harsha171100579,
  title = {{On the difference between variational and unitary coupled cluster theories}},
  author = {Gaurav Harsha and Toru Shiozaki and Gustavo E. Scuseria},
  year = {2018},
  journal = {The Journal of Chemical Physics},
  volume = {148},
  pages = {044107},
  doi = {10.1063/1.5011033}
}