Ma, X. H., R. L. Qin & W. B. Xing. 1985. Chromosome observation of twenty species of drug plants in Xingjiang. Acta Bot. Boreal.-Occid. Sin. 5: 149–154.
Chen, R. y., W. q. Song, X. l. Li, M. x. Li, G. l. Liang & C. b. Chen. 2003. Chromosome Atlas of Major Economic Plants Genome in China, Vol. 3, Chromosome Atlas of Garden Flowering Plants in China. Science Press, Beijing.