Baquero, F., García-Rodríguez, J. A., de Lomas, J. G., & Aguilar, L. (1999). Antimicrobial Resistance of 914 Beta-Hemolytic Streptococci Isolated from Pharyngeal Swabs in Spain: Results of a 1-Year (1996–1997) Multicenter Surveillance Study. American Society for Microbiology.

Baquero, Fernando, José Angel García-Rodríguez, Juan García de Lomas, و Lorenzo Aguilar. Antimicrobial Resistance of 914 Beta-Hemolytic Streptococci Isolated From Pharyngeal Swabs in Spain: Results of a 1-Year (1996–1997) Multicenter Surveillance Study. American Society for Microbiology, 1999.

Baquero, Fernando, José Angel García-Rodríguez, Juan García de Lomas, و Lorenzo Aguilar. Antimicrobial Resistance of 914 Beta-Hemolytic Streptococci Isolated From Pharyngeal Swabs in Spain: Results of a 1-Year (1996–1997) Multicenter Surveillance Study. American Society for Microbiology, 1999.