Hartley, R.T. CRIB: Computer Fault-finding through knowledge engineering. IEEE Computer, March 1984, pp. 76-83.

Hartley, Roger T., Expert systems methodology - a conceptual analysis. Int. J. of Systems Research and Information Science, Vol. 1, pp. 11-22, 1985.

Hartley, Roger T., A conceptual basis for expert systems methodology, Proceedings of Expert Systems 82, jointly sponsored by ACM-IEEE-SPL, Brunel University, U.K., September 1982.

Hartley, Roger T., How expert should an expert system be?, Proceedings 7th IJCAI, University of British Columbia, Vancouver Canada, pp. 862-867, August 1981.

Hartley, Roger T., The competent computer, MCSG/6 Man-Computer Studies Group. Brunel University, UK, January 1982.


Hartley, R.T. and Pfeiffer, H.D. Data Models for Conceptual Structures. International Conference on Conceptual Structures, Bulgaria, 2002.

Pfeiffer, H.D. and Hartley, R.T. Visual CP Representation of Knowledge. International Conference on Conceptual Structures, University of Darmstadt, Germany, August, 2000.

Hartley, R.T. and Barnden, J.A. Semantic Networks: Visualizations of Knowledge. Trends in Cognitive Science, 1(5), pp 169-175, 1997.

Kelsey, R.L., R.T. Hartley, and R.B. Webster. An Object-Based Methodology For Knowledge Representation In SGML. Proceedings of the 9th IEEE International Conference on Tools with Artificial Intelligence. Newport Beach, CA. Nov. 5-7, 1997.

Kelsey, R.L., R.T. Hartley, and R.B. Webster. Using Multiple Perspectives To Suppress Information And Complexity. Technical Report, Proceedings of SPIE Aerosense, Orlando, FL, April 1998.

Hartley, R.T., A Uniform Representation for Time and Space and their Mutual Constraints, special edition on Semantic Networks in Artificial Intelligence (ed. F. Lehmann), Computers and Mathematics with Applications. 1992.

Eshner, Daniel P. and Hartley. R.T. A unified approach to plan representation. 3rd. Rocky Mountain Conference on Artificial Intelligence. Denver, Colorado, June, 1988.

Hartley, R.T., H.D. Pfeiffer, and Dihong Qui: Representation for ViewGen: Structures and Reasoning, in Workshop on Propositional Knowledge Representation, Stanford, CA. 1992.

Wilks, Y. and Hartley R.T. Belief ascription and MGR: the merging of two paradigms. Proc. DARPA Workshop on speech and natural language processing. Cape Cod, Oct. 1989.

Hartley, Roger T., Representation of procedural knowledge for expert systems, IEEE 2nd. Conf. on AI Applications, December 1985.


Coombs, M.J., and Hartley, R.T., The MGR algorithm and its application to the generation of explanations of novel events, Int. J. of Man-Machine Studies 27, pp. 679-708, 1988.

Coombs, M.J., H.D. Pfeiffer and R.T. Hartley: e-MGR: an Architecture for Symbolic Plasticity, in the special issue of International Journal of Man-Machine Studies on inSymbolic Problem Solving in Noisy, Novel, and Uncertain Task Environmentsl. 36, pp.1-17. 1992.

Coombs, M.J., Hartley, R.T., Pfeiffer, H.D., Kilgore, B., How to become immune to facts. Proc. Rocky Mountain Conference on Artificial Intelligence, Las Cruces, June 1990.

Hartley, R.T. and Coombs, M.J. Abduction in Model Generative Reasoning. Proc. Workshop on Automated Abduction, AAAI Spring Symposium series, Stanford Univ. 1990.

Fields, C.A., Coombs, M.J., and Hartley, R.T. MGR: An architecture for problem solving in unstructured task environments. Proc. Int. Symp. Methodologies for Intelligent Systems, Ras (Ed.) Amsterdam: Elsevier, 1989.

Coombs, M.J., Hartley, R.T., Thompson, J.R. Design of a software environment for tactical situation development. Proc. US Army Symp. Artificial Intelligence Research for Exploitation of the Battlefield Environment, 1989.

Hartley, R.T. and Coombs, M.J. Reasoning with graph operations. Proc. Workshop on Formal aspects of Semantic Networks, Santa Catalina Island, March, 1989.

Coombs, M.J. and Hartley, R.T. Explaining novel events in process control through model generative reasoning, Int. J. of Expert Systems: Research and Applications, 1(2) pp. 87-110, 1988.

Hartley, Roger T., Coombs, M. J., Dietrich, E. An algorithm for open-world reasoning using model generation. 2nd Rocky Mountain Conference on Artificial Intelligence, Boulder, 1987.

Fields, C. A., M. J. Coombs, E. S. Dietrich, and R. T. Hartley. Incorporating dynamic control into the model generative reasoning system. Proc. European Conference on Artificial Intelligence, 1988.

R. T. Hartley. Representation of Procedural Knowledge. Department of Computer Science Science Technical Report, New Mexico State University, February, 1998.


Hartley, R. T. and K. Crumpton, Quality of OCR for Degraded Text Images. Digital Libraries 99, August 1999.


Hartley, R. T. MidiTrans - A MIDI File Transform Language. Submitted to Computer Music Journal, November 1998.

Iverson, E., and Hartley, R.T., Metabolizing Music, Proc. Int. Conf. on Computer Music, Glasgow, Scotland, August, 1990.


Hartley, R.T.and Pfeiffer, H.D. Visual CP Representation of Knowledge. International Conference on Visual Languages, Seattle, Washington, September 2000.

Pfeiffer, H.D. and R.T. Hartley: Temporal, Spatial, and Constraint Handling in the Conceptual Programming Environment, CP, in Journal for Experimental and Theoretical AI 4:2, pp.167-182,1992.

Hartley, Roger T., An overview of Conceptual Programming, Conference on Intelligent Systems and Machines. Oakland University, Rochester, Michigan, April 1986.

Hartley, Roger T., The foundations of Conceptual Programming, 1st Rocky Mountain Conference on Artificial Intelligence. Boulder, Colorado, May 1986.

Pfeiffer, H.D. and R.T. Hartley: The Conceptual Programming Environment, CP: Reasoning Representation using Graph Structures and Operations, in Proc. of IEEE Workshop on Visual Languages, Kobe, Japan. 1991.

Pfeiffer, H.D. and R.T. Hartley: The Conceptual Programming Environment, CP: Time, Space and Heuristic Constraints, in Proc. of the Sixth Annual Workshop on Conceptual Graphs, Binghamton, NY. 1991.

Pfeiffer, H.D. and R.T. Hartley: Set Representation and Processing Additions to Conceptual Programming, in Proc. of the Fifth Annual Workshop on Conceptual Graphs, Boston, MA, A.15-1 - 10. 1990.

Pfeiffer, H.D, and Hartley, R.T. Semantic additions to Conceptual Programming, Proc. 1989 Conceptual Graphs workshop, Detroit, MI, August 1989.

Eshner, D.P. and Hartley, R.T. Conceptual Programming with constraints. Proc. 1988 Workshop on Conceptual Graphs, Minneapolis, August, 1988.

Hartley, R.T., and Coombs, M.J. Conceptual Programming: Foundations of problem-solving, in Conceptual Graphs: Theory and Applications, edited by Sowa, J.F., Foo, N., and Rao, P. Addison Wesley (also available as MCCS-88-128, CRL memorandum series).

Hartley, R.T., Algorithms for the substrate of MGR, Memoranda in Computer and Cognitive Science, Computing Research Lab., MCCS-90-201, 1990.


Coombs, Michael J., Hartley, Roger T., Stell, John G., Debugging user conceptions of interpretations processes. AAAI-86, Philadelphia, August 1986.

Johnson L., and R. T. Hartley, Conversation theory and cognitive coherence theory, 7th European Meeting on Cybernetics and General Systems, Vienna, Austria, April 1984.

Fields, C., Cavendish, C., Coombs, M., Eskridge, T., Hartley, R., Pfeiffer, H., Soderlund, C., Kirby, S., McWilliams, G. Architecture of the Mercury mesoscale meteorological data fusion system. Proc. IIPS-89, 1989.

Prasad, N.R., Ranade, S.J., Dietrich, E., Hartley, R.T., Kalra, P.K. A speculative framework for the application of artificial intelligence to large-scale inteconnected power systems. IEEE Transactions on Power Systems, 1989.

Hartley, Roger T., Investment analysis - a new approach, in A Handbook for Management of Cyberneticsl., ed. F.H. George, G. T. Foulie Books, 1972.