Jonathan Ginzburg and Ivan A. Sag. 2000. Interrogative
Investigations. Stanford: CSLI Publications. Chapter 5: Unbounded
Dependencies. (.pdf file).
Chaves, Rui P. 2009. On a simpler grammar of extraction and
coordination. Unpublished manuscript, U. of Buffalo. This is the most
recent and comprehensive proposal for a traceless theory of extraction
in HPSG/SBCG. (.pdf file).
Further Readings:
Carl Pollard and Ivan
A. Sag. 1994. Head-Driven Phrase Structure Grammar. Chicago and
Stanford: U. Chicago Press and CSLI Publications. Chapter 4:
Unbounded Dependency Constructions. (.pdf
file). This is the original HPSG theory of unbounded dependencies
- with wh-traces.
Gosse Bouma, Gosse, Rob Malouf, and Ivan A. Sag. 2001. Satisfying
Constraints on Extraction and Adjunction. Natural Language and
Linguistic Theory 19.1: 1-65. This is the first attempt at a
traceless HPSG theory of filler-gap constructions that extends
properly to extraction path phenomena in Irish, Austronesian, Romance,
and other languages. (.pdf
file)
