Lahiri, A. R., and S. Das. “Observation on the Epicranio-Orbital Complex of Some Indian Aeshninae (Odonata : Aeshnidae)”. Records of the Zoological Survey of India, vol. 89, no. 1-4, Dec. 1991, pp. 155-66, doi:10.26515/rzsi/v89/i1-4/1991/161001.