1. ISO. Iso 12100–1: safety of machinery - general principles for design. International Organization for Standardization. Technical Report; 2010.
2. ISO. Iso 14121–1: safety of machinery - risk assessment. International Organization for Standardization. Technical Report; 2007.
3. ISO. Iso 31000: risk management - principles and guidelines. International Organization for Standardization. Technical Report; 2009.
4. ISO. Iso 13849–1: safety of machinery safety-related parts of control systems - part 1: general principles for design. International Organization for Standardization. Technical Report; 2006.
5. IEC. IEC/ISO 31010: 2009. International Electrotechnical Commission. Technical Report. Switzerland; 2009.