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. http://rstb.royalsocietypublishing.org/content/369/1649/20130255.

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 =
      {http://rstb.royalsocietypublishing.org/content/369/1649/20130255},
  }