Gruber, Jeffrey.Arkivert 7. januar 2007 hos Wayback Machine. 1965 Lexical Structures in Syntax and Semantics. Ph.D Thesis MIT. Published in 1976 by Elsevier North-Holland, Amsterdam.
Borer, HagitArkivert 8. september 2006 hos Wayback Machine.. 2005. The Normal Course of Events. Structuring Sense, Volume II. Oxford: Oxford University Press.
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let.uu.nl
Reinhart, Tanya 2002. «The Theta System: An Overview.» Theoretical Linguistics 28(3), pp. 229–290, 2002.
web.archive.org
Gruber, Jeffrey.Arkivert 7. januar 2007 hos Wayback Machine. 1965 Lexical Structures in Syntax and Semantics. Ph.D Thesis MIT. Published in 1976 by Elsevier North-Holland, Amsterdam.
Borer, HagitArkivert 8. september 2006 hos Wayback Machine.. 2005. The Normal Course of Events. Structuring Sense, Volume II. Oxford: Oxford University Press.