1. Negation, ambiguity, and presupposition;Atlas;Linguistics and Philosophy,1977
2. On presupposing;Atlas;Mind (NS),1978
3. How linguistics matters to philosophy: Presupposition, truth, and meaning;Atlas,1979
4. A note on the confusion of pragmatic and semantic aspects of negation;Atlas;Linguistics and Philosophy,1980
5. Is not logical?;Atlas;Proceedings of the Eleventh International Symposium on Multiple-Valued Logic (IEEE),1981