1. 93/43/EEC Council directive on the hygiene of foodstuffs: European legislation governing food hygiene regulations. Official Journal of the European Communities, No L 175/1.
2. BS1134-1 Assessment of surface texture—Part 1: Methods and Instrumentation;Anonymous,1972
3. BS1134-1 Assessment of surface texture—Part 1: Methods and Instrumentation;Anonymous,1988
4. BS1134-2: Assessment of surface texture Part 2: Guidance and general information;Anonymous,1991
5. BS4825-4: Stainless steel tubes and fittings for the food industry and other hygienic applications—Part 4: Specification for threaded (IDF type) coupling;Anonymous,1991