Bell, J M.(2007). Prevalence and Significance of a Negative Extended-Spectrum β-Lactamase (ESBL) Confirmation Test Result after a Positive ESBL Screening Test Result for Isolates of Escherichia coli and Klebsiella pneumoniae: Results from the SENTRY Asia-Pacific Surveillance Program. Journal of Clinical Microbiology, 45(5), 1478-1482. doi:10.1128/jcm.02470-06

Bell, Jan M. "Prevalence and Significance of a Negative Extended-Spectrum β-Lactamase (ESBL) Confirmation Test Result After a Positive ESBL Screening Test Result for Isolates of Escherichia Coli and Klebsiella Pneumoniae: Results From the SENTRY Asia-Pacific Surveillance Program". Journal of Clinical Microbiology, 45.5 ( 2007 ): 1478-1482.