6National Committee for Clinical Laboratory Standards (NCCLS) 1997. Methods for dilution antimicrobial susceptibility tests for bacteria that grow aerobically: Approved Standard M7A4[Z]. Villanova PA: NCCLS.
7George M, Eliopouios RC, Moellering JR. Antimierobial combinations[A]. In: Antibiotics in laboratory medicine [C]. NW Washington.. Society for microbiology, 1996: 330.
