Vandepas, Lauren E., Oliveira, Livia M., Lee, Serina S. C., Hirose, Euichi, Rocha, Rosana M., and Swalla, Billie J. 2015. "Biogeography of Phallusia nigra: Is It Really Black and White?."
Biological Bulletin. 228:52–64.
https://doi.org/10.1086/BBLv228n1p52