General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025:2005); German and English version EN ISO/IEC 17025:2005— 73 стр.
Concrete, reinforced and prestressed concrete structures - Part 2: Concrete - Specification, properties, production and conformity - Application rules for DIN EN 206-1— 62 стр.
German construction contract procedures (VOB) - Part C: General technical specifications in construction contracts (ATV) - Sett and slab pavements, and surrounds— 27 стр.