Information technology - Open Systems Interconnection - Part 1: Basic Reference Model: The Basic Model (ISO/IEC 7498-1:1994); English version EN ISO/IEC 7498-1:1995
Function blocks (FB) for process control - Part 3: Electronic Device Description Language (EDDL) (IEC 61804-3:2006); German version EN 61804-3:2007, text in English— 385 стр.