Srivastava M, Gupta S P
Z Parasitenkd. 1978 Mar 16;55(1):55-8. doi: 10.1007/BF00383475.
The polyphenol oxidase activity of Isoparorchis hypselobagri was estimated biochemically and was believed to be associated with egg-shell formation in the parasite. The eggs gave positive tests to color reaction of scleroprotein/melanin.