To cite evolvability in publications use:

  Geir H. Bolstad, Thomas F. Hansen, Christophe Pelabon, Mohsen
  Falahati-Anbaran, Rocio Perez-Barrales, and W. Scott Armbruster
  (2014). Genetic constraints predict evolutionary divergence in
  Dalechampia. Phil. Trans. R. Soc. B, 369, 20130255.
  https://doi.org/10.1098/rstb.2013.0255

A BibTeX entry for LaTeX users is

  @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},
  }