KUMAR BALIYAN, PRAVEEN, REENA TYAGI, R.P. SINGH, and SAURABH ARORA. 2010. “Simple, Sensitive and Rapid LC MS MS Method for Quantification of Residual Phenylbutazone in Milk”. Asian Journal of Chemistry 21 (9):7025-31. https://asianpubs.org/index.php/ajchem/article/view/12179.