1. The linguistic theory of numerals;Hurford,1975
2. Logic and conversation;Grice,1975
3. Hedges: a study in moaning criteria and the logic of fuzzy concepts;Lakoff;Chicago Linguistic Society Papers,1972
4. Pragmatics and social deixis; reclaiming the notion of conventional implicature;Levinson;Berkeley Linguistics Society,1979
5. Semantic relations among words;Miller,1978