1. WHO World Health Report 2005. http://www.who.int/whr/2005/annexes-en.pdf.
2. WHO World Health Report 2004. http://www.who.int/whr/2004/annex/en/index.htm.
3. Antibiotics versus staphylococci;Garrod;Br Med J,1956
4. Chemotherapeutics: scientific principles, methods and results;Ehrlich;Lancet,1913
5. Drug resistance threatens to reverse medical progress;WHO,2000