To cite 'PHENIX' in publications use:

Muñoz-Pajares A, Torices R (2015). “PHENIX: An R package to estimate a size-controlled phenotypic integration index.” Applications in plant sciences, 3. doi:10.3732/apps.1400104.

Corresponding BibTeX entry:

  @Article{,
    title = {PHENIX: An R package to estimate a size-controlled
      phenotypic integration index},
    author = {A.J. Muñoz-Pajares and R. Torices},
    journal = {Applications in plant sciences},
    volume = {3},
    year = {2015},
    doi = {10.3732/apps.1400104},
  }