@inproceedings{Valcarce:2013BY,
  author = "Valcarce, Alfredo  and  Fernández Caramés, Teresa  and  Vijande, Javier",
  title = "{Too many $X's$, $Y's$ and $Z's$?}",
  doi = "10.22323/1.171.0152",
  booktitle = "Proceedings of Xth Quark Confinement and the Hadron Spectrum {\textemdash} PoS(Confinement X)",
  year = 2013,
  volume = "171",
  pages = "152"
}