When using this data, please cite the original publication:

Additionally, you should cite the record:

@misc{hepdata.50145, author = "{CMD-2 Collaboration}", title = "{a_1(1260) dominance in the process e+e- \to 4\pi at energies 1.05--1.38 GeV}", howpublished = "{HEPData (collection)}", year = 2001, note = "\url{https://doi.org/10.17182/hepdata.50145}" }

or, if you prefer, a specific version of the record:

@misc{hepdata.50145.v1, author = "{CMD-2 Collaboration}", title = "{a_1(1260) dominance in the process e+e- \to 4\pi at energies 1.05--1.38 GeV (Version 1)}", howpublished = "{HEPData (collection)}", year = 2001, note = "\url{https://doi.org/10.17182/hepdata.50145.v1}" }

You can also cite this table directly.

@misc{hepdata.50145.v1/t2, author = "{CMD-2 Collaboration}", title = "{``Table 2'' of ``a_1(1260) dominance in the process e+e- \to 4\pi at energies 1.05--1.38 GeV'' (Version 1)}", howpublished = "{HEPData (dataset)}", year = 2001, note = "\url{https://doi.org/10.17182/hepdata.50145.v1/t2}" }