Edward A. Lee, "Modeling Concurrent Real-time Processes Using Discrete Events," Invited paper, Annals of Software Engineering, Special Volume on Real-Time Software Engineering, vol. 7 (1999), pp. 25-45. Revised from UCB/ERL Memorandum M98/7, March 4th 1998.
J. Liu, X. Liu, T. J. Koo, B. Sinopoli, S.Sastry, and E. A. Lee, "Hierarchical Hybrid System Simulation," 38th IEEE conference on Decision and Control, Dec. 1999, Phoenix, AZ.
Edward A. Lee and David G. Messerschmitt, "A Highest Education in the Year 2049," Proceedings of the IEEE, Volume 87 Number 9, September 1999 (Invited paper).
J. Davis II, M. Goel, C. Hylands, B. Kienhuis, E. A. Lee, J. Liu, X. Liu, L. Muliadi, S. Neuendorffer, J. Reekie, N. Smyth, J. Tsay and Y. Xiong, "Overview of the Ptolemy Project," ERL Technical Memorandum UCB/ERL No. M99/37, Dept. EECS, University of California, Berkeley, CA 94720, July 1999. This paper has been superseded by Technical Memorandum UCB/ERL M01/11, March 6, 2001, also entitled Overview of the Ptolemy Project
Alain Girault, Bilung Lee, and Edward A. Lee, "Hierarchical Finite State Machines with Multiple Concurrency Models," IEEE Transactions On Computer-aided Design Of Integrated Circuits And Systems, Vol. 18, No. 6, June 1999 (revised from Memorandum UCB/ERL M97/57, Electronics Research Laboratory, University of California, Berkeley, CA 94720, August 1997).
J. Reekie, S. Neuendorffer, C. Hylands and E. A. Lee "Software Practice in the Ptolemy Project," Technical Report Series, GSRC-TR-1999-01, Gigascale Semiconductor Research Center, University of California, Berkeley, CA 94720, April 1999.