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Tian, X. h., B. c. Zhu, Y. p. Xiao, Q. h. Liu & G. Zhao. 1993. On the karyotypes of five species of Leguminosae. J. Shaanxi Norm. Univ., Nat. Sci. Ed. 21(2): 62–65.
Yan, G. x., S. z. Zhang, F. h. Xue, L. y. Wang, J. f. Yun & X. q. Fu. 2000. The chromosome numbers and natural distribution of 38 forage plants in north China. Grassl. China 2000(5): 1–5.