Shabana Sultana, Bojja Rajeshwar Rao, and Cherkupally Sanjeeva Reddy. 2014. “AM1 Study on the Conformations of Keto-Enol Tautomerism in Methicillin”. World Journal of Pharmaceutical Sciences 2 (8):839-45. https://wjpsonline.com/index.php/wjps/article/view/study-conformations-keto-enol-tautomerism-methicillin.