Klepser, M. E., Marangos, M. N., Zhu, Z., Nicolau, D. P., Quintiliani, R., & Nightingale, C. H. (1997). Comparison of the bactericidal activities of piperacillin-tazobactam, ticarcillin-clavulanate, and ampicillin-sulbactam against clinical isolates of Bacteroides fragilis, Enterococcus faecalis, Escherichia coli, and Pseudomonas aeruginosa.

Klepser, M E., M N. Marangos, Z. Zhu, D P. Nicolau, R. Quintiliani, et C H. Nightingale. Comparison of the Bactericidal Activities of Piperacillin-tazobactam, Ticarcillin-clavulanate, and Ampicillin-sulbactam against Clinical Isolates of Bacteroides Fragilis, Enterococcus Faecalis, Escherichia Coli, and Pseudomonas Aeruginosa. 1997.

Klepser, M E., et al. Comparison of the Bactericidal Activities of Piperacillin-tazobactam, Ticarcillin-clavulanate, and Ampicillin-sulbactam against Clinical Isolates of Bacteroides Fragilis, Enterococcus Faecalis, Escherichia Coli, and Pseudomonas Aeruginosa. 1997.