Rizvi, MeherFatima, NazishShukla, InduMalik, Abida2012-09-252012-09-252010-01Rizvi Meher, Fatima Nazish, Shukla Indu, Malik Abida. Epidemiology of extended spectrum β-lactamases in Serratia and Citrobacter species in North India. Indian Journal of Pathology & Microbiology. 2010 Jan-Mar; 53(1): 193-194.http://imsear.searo.who.int/handle/123456789/141643enEpidemiology of extended spectrum β-lactamases in Serratia and Citrobacter species in North India.Article