@article{stefanik2015structure,
  author = {{\v{S}}tef{\'a}nik, D. and {\v{S}}imkovic, F. and Faessler, A.},
  title = {Structure of the two-neutrino double-{$\beta$} decay matrix elements within perturbation theory},
  journal = {Physical Review C},
  publisher = {American Physical Society (APS)},
  volume = {91},
  number = {6},
  pages = {064311},
  year = {2015},
  doi = {10.1103/PhysRevC.91.064311},
  issn = {0556-2813}
}