薛春迎, 何廷农, 刘建全. 四数獐牙菜的胚胎学及其系统学意义[J]. 植物分类学报, 1999, 37(3): 259-263.
XUE Chun-Ying, HO Ting-Nong, LIU Jian-Quan. Embryology of Swertia tetraptera Maxim. (Gentianaceae) and its systematic implication[J]. Acta Phytotaxonomica Sinica, 1999, 37(3): 259-263.