@conference{Zeigler:1989aa,
Address = {Washington, DC},
Author = {Zeigler, B.P. and Hu, J.F. and Rozenblit, J.W.},
Booktitle = {Proc. of the 1989 Winter Simulation Conference},
Month = {December},
Pages = {84-89},
Title = {Hierarchical, Modular Modeling in DEVS-Scheme},
Year = {1989}}