| 1968-001 | Erik Sandewall: Lisp A, A Lisp-like System for Incremental Computing. Proceedings of Spring Joint Computer Conference, 1968, pages 375-384.
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| 1968-002 | Erik Sandewall: Concepts and methods for heuristic search. Departmental report, Department of Computer Science, Uppsala University, number 16.
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| 1968-003 | Erik Sandewall: A formal notation that re-expresses natural language sentence structure. Departmental report, Department of Computer Science, Uppsala University, number 12.
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| 1968-004 | Erik Sandewall: Use of ambiguity logic in the picture description language. Unpublished manuscript. |