Boyce J. M. (2007). "Environmental contamination makes an important contribution to hospital infection". Journal of Hospital Infection. 65 (S2): 50–54. doi:10.1016/s0195-6701(07)60015-2. PMID17540242.
Boyce J. M. (2007). "Environmental contamination makes an important contribution to hospital infection". Journal of Hospital Infection. 65 (S2): 50–54. doi:10.1016/s0195-6701(07)60015-2. PMID17540242.