- Mike Paterson, editor, Automata, Languages and Programming, 17th International Colloquium, ICALP90, Warwick University, England, July 16-20, 1990, Proceedings. Volume 443 of Lecture Notes in Computer Science, Springer, 1990.
- Hélène Kirchner, Wolfgang Wechler, editors, Algebraic and Logic Programming, Second International Conference, Nancy, France, October 1-3, 1990, Proceedings. Volume 463 of Lecture Notes in Computer Science, Springer, 1990.