Methods of test for masonry units - Part 21: Determination of water absorption of clay and calcium silicate masonry units by cold water absorption; German version EN 772-21:2011— 7 стр.
Methods of test for mortar for masonry - Part 11: Determination of flexural and compressive strength of hardened mortar; German version EN 1015-11:1999+A1:2006— 15 стр.