Chang, Y.-D.; He, D.-H. 2001b. A taxonomic study of the ant genus Tetramorium (Hymenoptera: Formicidae) in northwest China. [In Chinese.]. Journal of Ningxia Agricultural College 22(1):1-7. PDF

Chang, Y.-D.; He, D.-H. 2001c. A taxonomic study of the ant genus Leptothorax from northwestern China. [In Chinese.]. Journal of Ningxia Agricultural College 22(2):1-4. PDF