A convenient assay for estimating the possible involvement of efflux of fluoroquinolones by Streptococcus pneumoniae and Staphylococcus aureus: evidence for diminished moxifloxacin, sparfloxacin, and trovafloxacin efflux. - Beyer,R.; Pestova,E.; Millichap,J.J. (Antimicrob Agents Chemother, 2000)