Chao, H. -F., 1954. Classification of Chinese dragonflies of the family Gomphidae (Odonata), Part II. Acta entomologica sinica, 4: 23-82.
Chao, H. -F., 1990. The Gomphid Dragonflies of China (Odonata: Gomphidae). 14 + 486 pp., The Science and Technology Publishing House, Fuzhou, Fujian, China.
Fraser, F. C., 1934. The Fauna of British India, including Ceylon and Burma. Odonata. Vol. II. i-xxi + 398 pp., Taylor & Francis, London.
Garrison, R.W., N. von Ellenrieder, & J. A. Louton, 2006. Dragonfly Genera of the New World, an Illustrated and Annotated Key to the Anisoptera. i-xiv + 368 pp., The John Hopkins University Press, Baltimore, USA.