1. British Standard 5726;British Standards Institution,1979
2. The evaluation of open fronted biological “safety” cabinets;Clark;Lab. Practice,1980
3. Limitations of microbiological safety cabinets;Clark;Lab. Practice,1980
4. How safe are safety cabinets?;Clark;Nature,1980
5. A comparison of methods to measure operator protection factors in open fronted microbiological safety cabinets;Clark;J. Appl. Bact.,1981