Morris, Ashley B.; Bell, Charles D.; Clayton, Joshua W.; Judd, Walter S.; Soltis, Douglas E.; Soltis, Pamela S. (2007). "Phylogeny and Divergence Time Estimation in Illicium with Implications for New World Biogeography". Systematic Botany. 32 (2): 236–249. doi:10.1600/036364407781179734.Parameter |s2cid= yang tidak diketahui akan diabaikan (bantuan)