1. CEN. (2001). EN 459-1:2001—Building lime. Part 1: Definitions, specifications and conformity criteria.
2. CEN. (2010). EN 459-1:2010—Building lime. Part 1: Definitions, specifications and conformity criteria.
3. CEN. (2015). EN 459-1:2015—Building lime. Part 1: Definitions, specifications and conformity criteria.
4. CEN. (1999). EN 1015-3:1999/A1:2004/A2:2006)—Methods of test for mortar for masonry. Part 3: Determination of consistence of fresh mortar (by flow table).
5. CEN. (1998). EN 1015-6:1998/A1:2006—Methods of test for mortar for masonry. Part 6: Determination of bulk density of fresh mortar.