For Sorghum
Barkworth, M.E. 2003r. Sorghum. In Flora of North America Editorial Committee. 2003a. Flora of North America north of Mexico. Volume 25, Magnoliophyta: Commelinidae (in part): Poaceae, part 2. Oxford Univ. Press, New York, NY. 783 pp.
de Wet, J.M.J. 1978. Systematics and evolution of Sorghum sect. Sorghum (Gramineae). Amer. J. Botany 65: 477-484.
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