KRISHNA, P., and K. SREERAMULU. “OPHISTHOLEBES TETRODONTIS (TREMATODA : DIGENEA) A NEW RECORD FROM WALTAIR COAST”. UTTAR PRADESH JOURNAL OF ZOOLOGY, vol. 13, no. 1, Jan. 1993, pp. 89-90, https://www.mbimph.com/index.php/UPJOZ/article/view/1191.