Urban, Ignatz (20 May 1907). "Olacaceae". Symbolae Antillanae, Seu, Fundamenta Florae Indiae Occidentalis (in German and Latin). 5 (2): 184. doi:10.5962/bhl.title.144. Retrieved 29 December 2021.
Urban, Ignatz (20 May 1907). "Olacaceae". Symbolae Antillanae, Seu, Fundamenta Florae Indiae Occidentalis (in German and Latin). 5 (2): 184. doi:10.5962/bhl.title.144. Retrieved 29 December 2021.
Wolfe, J.A.; Wehr, W.C. (1987). Middle Eocene dicotyledonous plants from Republic, northeastern Washington (Report). Bulletin. Vol. 1597. United States Geological Survey. pp. 1–25. doi:10.3133/b1597.