@article{Bouakline2021,
  author    = {Foudhil Bouakline},
  title     = {Umbrella inversion of ammonia redux},
  journal   = {Physical chemistry, chemical physics : PCCP ; a journal of European chemical societies},
  volume    = {23},
  number    = {36},
  pages     = {20509 -- 20523},
  doi       = {10.1039/d1cp01991k},
  year      = {2021},
}