Activity of levofloxacin and ciprofloxacin in combination with cefepime, ceftazidime, imipenem, piperacillin-tazobactam and amikacin against different Pseudomonas aeruginosa phenotypes and Acinetobacter spp - Drago,L.; De Vecchi,E.; Nicola,L.; Colombo,A.; Guerra,A.; Gismondo,M.R. (Chemotherapy, 2004)