| 1990-002 | Erik Sandewall: Lisp as a Very High Level Implementation Language. Proceedings of European Conference on Practical Applications of Lisp (EuroPAL), 1990, pages 29-34.
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| 1990-003 | Erik Sandewall: Reasoning about the World as Perceived by an Agent. Proceedings of European Conference on Artificial Intelligence, 1990, pages 579-584.
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| 1990-001 | Erik Sandewall: Towards a Logic of Dynamic Frames. International Journal of Expert Systems, vol. 3 (1990), pages 355-370.
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| 1990-004 | Erik Sandewall, Giovanni Adorni, Hans-Hellmut Nagel and Monique Thonnat: PROMETHEUS Session. Proceedings of European Conference on Artificial Intelligence, 1990, pages 779-780.
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| 1990-004 | Erik Sandewall: PROMETHEUS Session. Departmental report, nil.
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