Karlowsky, J. A., Weaver, M. K., Thornsberry, C., Dowzicky, M. J., Jones, M. E., & Sahm, D. F. (2003). Comparison of Four Antimicrobial Susceptibility Testing Methods To Determine the In Vitro Activities of Piperacillin and Piperacillin-Tazobactam against Clinical Isolates of Enterobacteriaceae and Pseudomonas aeruginosa. American Society for Microbiology.

Karlowsky, James A., Mellany K. Weaver, Clyde Thornsberry, Michael J. Dowzicky, Mark E. Jones, و Daniel F. Sahm. Comparison of Four Antimicrobial Susceptibility Testing Methods To Determine the In Vitro Activities of Piperacillin and Piperacillin-Tazobactam against Clinical Isolates of Enterobacteriaceae and Pseudomonas Aeruginosa. American Society for Microbiology, 2003.

Karlowsky, James A., et al. Comparison of Four Antimicrobial Susceptibility Testing Methods To Determine the In Vitro Activities of Piperacillin and Piperacillin-Tazobactam against Clinical Isolates of Enterobacteriaceae and Pseudomonas Aeruginosa. American Society for Microbiology, 2003.