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Malan, Elfranco; Swinny, Ewald; Ferreira, Daneel; Steynberg, Petrus (1996-03-01). "The structure and synthesis of proguibourtinidins from Cassia abbreviata". Phytochemistry. 41 (4): 1209–1213. Bibcode:1996PChem..41.1209M. doi:10.1016/0031-9422(95)00656-7.
Orwa, C.; Mutua, A.; Kindt, R.; Jamnadass, R.; Anthony, S. "Cassia abbreviata"(PDF). worldagroforestry.org. Agroforestree Database: a tree reference and selection guide version 4.0. Retrieved 16 May 2016.