1. Aoun Joseph, Audrey Li (1993a) Wh-elements in situ: Syntax or LF. Linguistic Inquiry 24: 199–238
2. Aoun Joseph, Audrey Li (1993b) On some differences between Chinese and Japanese wh-elements. Linguistic Inquiry 24: 365–372
3. Baker Carl L (1970) Notes on the description of English questions: The role of an abstract question morpheme. Foundations of Language 6: 197–219
4. Beck, Sigrid. 1996. Wh-constructions and transparent Logical Form. Ph.D. diss., University of Tuebingen.
5. Beck Sigrid (2006) Intervention effects follow from focus interpretation. Natural Language Semantics 14: 1–56