One of the weaknesses of this version of the encyclopedia which I hope to fix in future versions is the lack of references to primary sources - books and articles on the topics discussed here, including non-WG sources. However there are already a few references to the following books and articles:
By Dick Hudson
1984. Word Grammar, Blackwell
1990. English Word Grammar, Blackwell
1995. Word Meaning, Routledge
1996. Sociolinguistics (2nd edition), CUP
1998. English Grammar, Routledge
Articles or chapters
1995. Does English really have case?
1997. The rise of auxiliary DO: verb-non-raising or category-strengthening?
1997. Inherent variability and linguistic theory.
1998. Trouble on the left periphery:
1999. (with Chet Creider) Inflectional morphology in Word Grammar.
1999. Subject-verb agreement in English.
2000. (with Jasper Holmes) Re-cycling in the encyclopedia.
2002. (with Amela Camdzic) Serbian-Croat-Bosnian clitics and Word Grammar.
1998. *I amn't.
1998. Language as a cognitive network.
1999. Case Agreement, PRO and Structure Sharing.
2000. Grammar Without Functional Categories.
2000. Quantifiers in Word Grammar.
2000. Gerunds and multiple default inheritance.
2001. Clitics in Word Grammar.
2001. Word Grammar (for Handbook of Cognitive Linguistics).
2002. Case-agreement, PRO and structure sharing.
2002. Buying and selling in Word Grammar.
Deacon, T 1997. The Symbolic Species. Penguin
Langendonck, Willy van. "Determiners as Heads?." Cognitive Linguistics 5 (1994): 243-59.
Levelt, W, Roelofs, A and Meyer, A 1999. A theory of lexical access in speech production. Behavioral and Brain Sciences 22, 1-45.
Pinker, S 1997. How the Mind Works. Penguin.
Reisberg, D 1996. Cognition. Exploring the Science of the Mind. Norton.
Rosta, A 1997. English Syntax and Word Grammar Theory, London PhD
Sperber, D and Wilson, D 1995. Relevance. Communication and Cognition. Oxford: Blackwell.
Tesnie`re, Lucien. 1959. Éléments de Syntax Structurale. Klincksieck.
If you want more references there are lists on my web site and on the site for Word Grammar. There are also links there to web-sites for other general theories of language structure.