1. IEC 61131-3 International Standard, Programmable controllers. Part 3: Programming Languages, 2003.
2. Implementation aspects of the PLC standard IEC 1131-3;Ohman;Control Engineering Practice,1998
3. Programming Industrial Automation Systems IEC 61131-3;Karl-Heinz,2001
4. Exceptions in a Programmable Logic Controller implementation based on ADA;Medrano;Computers in Industry,2007
5. Analysis and implementation of the IEC 61131-3 software model under POSIX real-time operating systems;Plaza;Microprocessors and Microsystems,2006