Safila Naveed, Amna Affa baig, Anum Jameel, Faiza Nadeem, Madiha Qazi, Firdous Ahmad, & Marium Khan. (2014). Increased use of cephalosporin as first line agent instead of penicillin. World Journal of Pharmaceutical Sciences, 2(4), 270–275. Retrieved from https://wjpsonline.com/index.php/wjps/article/view/increased-use-cephalosporin-first-line-agent-instead-penicillin