Gebrehiwot, Hadush, et al. “Chemical Analysis and Medicinal Activities of Volatile Components from the Seeds of Croton Macrostachyus”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 37, no. 2, Feb. 2018, pp. 316-30, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/8628.