@inproceedings{Gavrilova:2019Bn,
  author = "Gavrilova, Margarita  and  Teryaev, Oleg",
  title = "{Frame-independent angular distributions as density matrix in-variants}",
  doi = "10.22323/1.352.0287",
  booktitle = "Proceedings of XXVII International Workshop on Deep-Inelastic Scattering and Related Subjects {\textemdash} PoS(DIS2019)",
  year = 2019,
  volume = "352",
  pages = "287"
}