1. Construction Products Directive 89/106/EEC: Construction Directive of 21 December 1988, Official Journal of the European Communities No L 40, 11.2.1989. Brussels, Belgium
2. Construction Products Directive 93/68/EEC: Construction Directive 93/68/EEC of 22 July 1993, Official Journal of the European Communities No L 220/22 30.8.1993. Brussels, Belgium
3. EN 197-2 Cement—Part 2: Conformity evaluation. CEN, Brussels, Belgium
4. EN 196-2: 2005 Methods of testing cement—Part 2: Chemical analysis of cement. CEN, Brussels, Belgium
5. EN 196-1:2005. Methods of testing cement—Part 1: Determination of strength. CEN, Brussels, Belgium