Park, Ki-Ryong; Jansen, Robert K. (2007). "A phylogeny of Euphorbieae subtribe Euphorbiinae". Journal of Plant Biology. 50 (6): 644–49. doi:10.1007/BF03030608. S2CID6686756.
Park, Ki-Ryong; Jansen, Robert K. (2007). "A phylogeny of Euphorbieae subtribe Euphorbiinae". Journal of Plant Biology. 50 (6): 644–49. doi:10.1007/BF03030608. S2CID6686756.