Household and similar electrical appliances - Safety - Part 2-72: Particular requirements for automatic machines for floor treatment for commercial use (IEC 60335-2-72:2002 + A1:2005, modified) (english version)
Safety of machinery - Basic concepts, general principles for design - Part 1: Basic terminology, methodology - Amendment 1 (ISO 12100-1:2003/Amd 1:2009); German version EN ISO 12100-1:2003/A1:2009— 8 стр.