To cite evolvability in publications use:

Bolstad G, Hansen T, Pelabon C, Falahati-Anbaran M, Perez-Barrales R, Armbruster W (2014). “Genetic constraints predict evolutionary divergence in Dalechampia blossoms.” Phil. Trans. R. Soc. B, 369, 20130255. https://doi.org/10.1098/rstb.2013.0255.

Corresponding BibTeX entry:

  @Article{,
    title = {Genetic constraints predict evolutionary divergence in
      Dalechampia blossoms},
    author = {Geir H. Bolstad and Thomas F. Hansen and Christophe
      Pelabon and Mohsen Falahati-Anbaran and Rocio Perez-Barrales and
      W. Scott Armbruster},
    journal = {Phil. Trans. R. Soc. B},
    year = {2014},
    volume = {369},
    issue = {1649},
    pages = {20130255},
    url = {https://doi.org/10.1098/rstb.2013.0255},
  }