1. Ghallab, M. et al. (1998) PDDL: The Planning Domain Definition Language v.2. Technical Report CVC TR-98–003, Yale Center for Computational Vision and Control.
2. Gruninger, M., and Fox, M.S., (1995), The Role of Competency Questions in Enterprise Engineering, Benchmarking: Theory and Practice, Rolstadas, A. (ed ). Kluwer Academic Publishers, Boston.
3. Hayes, P. (1996) A Catalog of Temporal Theories. Artificial Intelligence Technical Report UIUC-BI-AI-96–01, University of Illinois at Urbana-Champaign.
4. Hendler, J. amd McGuinness, D.L. (2001): DARPA Agent Markup Language. IEEE Intelligent Systems, 15: 72–73.
5. Lee, J., Gruninger, M., Jin, Y., Malone, T., Tate, A., Yost, G. (1998) The PIF Process Interchange Format and Framework, Knowledge Engineering Review, 2: 1–30.