Yang G. H. 1996: A Flexible Model Based Decision Making Approach, in Proceedings of the 1996 First Asia Pacific Decision Sciences Institute Conference (Hong Kong, June 21-22, 1996), Vol. I, 387-394.

Yang G. H. and Muller-Malek H. 1995: Applications of Intelligent Engineering in Physical Distribution Systems, in Preprints of LSS'95: 7th IFAC/IFORS/IMACS Symposium on Large Scale Systems: Theory and Applications (London, U.K. July 11-13, 1995).

Yang G. H. and Muller-Malek H. 1995: The Applications of Flexible Model Shell for Inventory System, to be submitted for  ESS'95: European Simulation Symposium (Erlangen-Nuremberg, Germany, Oct. 26-28, 1995).

Yang G. H. and Muller-Malek H. 1994: The Flexible Model and Its Studies, in Proceedings of the 2nd International Conference on Concurrent Engineering and Electronic Design Automation (Bournemouth, U.K., Apr. 7-8, 1994), 183-188.

Yang G. H. and Muller-Malek H. 1994: The Application of Intelligent Engineering in the Optimal Paths Computer Aided Design, in Preprints of the 1994 IFAC Conference on Integrated System Engineering (Baden-Baden, Germany, Sep. 27-29, 1994).

Yang G. H. and Muller-Malek H. 1994: The Flexible Model and Its Shell, in Proceedings of the 1st International Workshop on Fuzzy Logic and Intelligent Technologies in Nuclear Science (Mol, Belgium, Sep. 14-16, 1994), 138-143.

Yang G. H. and Muller-Malek H. 1994: The Flexible Model and Its Studies(II), in Proceedings of the 1994 European Simulation Symposium (Istanbul, Turkey, Oct. 9-12, 1994), Vol. III, 61-64.

Yang G. H. and Muller-Malek H. 1993: A Theoretical Framework of Intelligent Engineering for Logistics Decision and Management, in Proceedings of the 1993 European Simulation Symposium (Delft University of Technology, Delft, the Netherlands, Oct. 25-28, 1993), 232-237.

Yang G. H. and Ruan D. 1992: DBCDSP: Downhill Belt Conveyer Dynamic Simulation in Pascal, in Preprints of IFAC 7th MMM'92 Symposium (Beijing, P. R. China, Aug. 26-28, 1992), 28-32.