Lahiri, A.R. and Das, S. 1991. Observation on the Epicranio-Orbital Complex of Some Indian Aeshninae (Odonata : Aeshnidae). Records of the Zoological Survey of India. 89, 1-4 (Dec. 1991), 155–166. DOI:https://doi.org/10.26515/rzsi/v89/i1-4/1991/161001.