@article{lichard2020pionium,
  author = {Lichard, P.},
  title = {Pionium as a source of false events in the K -> pi nu nubar decays.},
  journal = {Physical Review D},
  publisher = {American Physical Society (APS)},
  volume = {102},
  number = {11},
  pages = {113005},
  year = {2020},
  doi = {10.1103/PhysRevD.102.113005},
  issn = {2470-0010}
}