Comparative in vitro activity of cefepime and four extended-spectrum beta-lactams on 1,251 aminoglycoside-resistant gram-negative hospital strains36644, Vanhoof, R., Nulens E., Nyssen H.J., and Hannecart-Pokorni E. , Chemotherapy, 0/0/1992, Volume 38, Issue 4, Number 231, p.225 - 231, (1992)