For Centrosema
Fantz, P.R. 2002a. Distribution of Centrosema (Leguminosae: Phaseoleae: Clitoriinae) for the Flora of North America project. Vulpia 1: 41-81.
Isely, D. 1998. Native and naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Monte L. Bean Life Science Museum, Brigham Young Univ., Provo, UT.