1. Ahuja JS, Valavanis KP. A hierarchical modeling methodology for flexible manufacturing systems using extended Petri nets. In: The proceedings of the 1988 international conference on computer integrated manufacturing, Rensselaer Polytechnic Institute, Troy, NY, May 1988, pp 350–6
2. Allen DK. An introduction to computer-aided process planning. CIM Rev 1987; Fall: 7–23
3. Antonelli CJ. Exception handling in a multi-context environment. PhD thesis, University of Michigan, Ann Arbor, February 1989 (RSD-TR-2-89)
4. Atabakhche H, Simonetti Barbalho D, Valette R, Courvoisier M. From Petri net based PLCs to knowledge based control. In: Proceedings of the IECON’86, 1986, pp 817–22
5. Bean JC, Birge JR, Mittenthal J, Noon CE. Matchup scheduling with multiple resources, release dates and disruptions. Oper Res 1991; 39(3)