1. Anon 1977 Requirements for antibiotic susceptibility tests. 1. Agar diffusion tests using antibiotic susceptibility discs WHO Expert Committee on Biological Standardisation
2. A revised system for antibiotic sensitivity testing. Swedish Reference Group for Antibiotics;Anon;Scandinavian Journal of Infectious Diseases,1981
3. Anon 1984 Methoden zur Empfindlichkeitsprufung von bakteriellen Krankheitserregern (ausser Mykobakterian) gegen Chemotherapeutika Deutsches Institut fur Normung