Karabasanavar, Nagappa S, and Suresh P Singh. “Occurrence of Chlorpyrifos Residues in Milk of Terai Region of Uttarakhand, India”. Indian Journal of Dairy Science, vol. 65, no. 5, Nov. 2012, https://epubs.icar.org.in/index.php/IJDS/article/view/25291.