Thirumalai, G. “On Gerridae and Notonectidae (Heteroptera Hemiptera: Insecta) from the Silent Valley, Kerala”. Records of the Zoological Survey of India, vol. 84, no. 1-4, Dec. 1986, pp. 8-34, doi:10.26515/rzsi/v84/i1-4/1986/161078.