To cite the SOFIA package in publications use:

L. D, G. C, B. S, J. Z (2017). “SOFIA: an R package for enhancing genetic visualization with Circos.” Journal of Heredity, 1.

Corresponding BibTeX entry:

  @Article{,
    title = {SOFIA: an R package for enhancing genetic visualization
      with Circos},
    author = {Diaz-Garcia L. and Covarrubias-Pazaran G. and Schlautman
      B. and Zalapa J.},
    journal = {Journal of Heredity},
    year = {2017},
    volume = {1},
  }