Konstant, William R., Russell A. Mittermeier, Anthony B. Rylands, Thomas M. Butynski, Ardith A. Eudey, Jörg Ganzhorn, and Rebecca Kormos. 2002. “The World’s Top 25 Most Endangered Primates – 2002”. Neotropical Primates 10 (3): 128-31. https://doi.org/10.62015/np.2002.v10.519.