1. User Layer Technical Report for the Fieldbus Standard, ISA-TR50.02, Part 9-TRI;Instrument Society of America;Technical Report (ISA/SP50-1993-389F),1993
2. Distributed Control Functionality Moves Downstream;Furness;Control Engineering,1993
3. Technical Committee No. 65: Industrial-Process Measurement and Control;International Electrotechnical Commission;Working Group 6, Committee Draft — Function Blocks for Industrial-Process Measurement and Control Systems, Part I — General Requirements,1995
4. Fieldbus Specification;Fieldbus Foundation;Function Block Application Process — Parts 1&2, FF-94-890, FF-94-8891,1995
5. The Digital Future of Process Control; Possibilities, Limitations, and Ramifications;Bialkowski;Tappi Journal,1994