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| 1988 | ||
|---|---|---|
| 1 | Philippe Besnard, Jean Houdebine, Raymond Rolland: A Formula Circumscriptively both Valid and Unprovable. ECAI 1988: 516-518 | |
| 1 | Philippe Besnard | [1] |
| 2 | Raymond Rolland | [1] |
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