Alou, L., Ramirez, M., García-Rey, C., Prieto, J., & de Lencastre, H. (2001). Streptococcus pneumoniae Isolates with Reduced Susceptibility to Ciprofloxacin in Spain: Clonal Diversity and Appearance of Ciprofloxacin-Resistant Epidemic Clones. Antimicrob Agents Chemother.

Alou, Luis, Mario Ramirez, César García-Rey, José Prieto, and Hermínia de Lencastre. "Streptococcus Pneumoniae Isolates With Reduced Susceptibility to Ciprofloxacin in Spain: Clonal Diversity and Appearance of Ciprofloxacin-Resistant Epidemic Clones." Antimicrob Agents Chemother 2001.

Alou, Luis, et al. "Streptococcus Pneumoniae Isolates With Reduced Susceptibility to Ciprofloxacin in Spain: Clonal Diversity and Appearance of Ciprofloxacin-Resistant Epidemic Clones." Antimicrob Agents Chemother 2001.