1. Negation and the strength of presuppositions: or there is more to speaking than words;Allwood,1977
2. Reasons for requests;Baranova;Discourse Stud.,2016
3. Cross-cultural Pragmatics: Requests and Apologies,1989
4. Interrogative Structures of American English;Bolinger,1957
5. Aspects of Language;Bolinger,1975