@article{gando2019precision,
  author = {Gando, A. and Gando, Y. and Hachiya, T. and Minh, M. and {\v{S}}imkovic, F. and others},
  title = {Precision Analysis of the Xe-136 Two-Neutrino beta beta Spectrum in {KamLAND}-Zen and Its Impact on the Quenching of Nuclear Matrix Elements},
  journal = {Physical Review Letters},
  publisher = {American Physical Society (APS)},
  volume = {122},
  number = {19},
  pages = {192501},
  year = {2019},
  doi = {10.1103/PhysRevLett.122.192501},
  issn = {0031-9007}
}