Additional bibliography for study
Fischer, O. 2007. Morphosyntactic Change. Functional and Formal Perspectives. Oxford: Oxford University Press.
Kroch, A. 2001. “Syntactic Change”. In: M. Baltin & C. Collins (eds), The Blackwell Handbook of Syntax. Oxford: Blackwell, 699-729.
Labov, W. 1994, 2001. Principles of Linguistic Change. Volumes 1 and 2. Oxford: Blackwell.
Lightfoot, D. W. 1991. How to Set Parameters: Arguments from Language Change. Cambridge, MA: MIT Press.
Roberts, I. & A. Roussou. 2005. Syntactic Change: a Minimalist Approach to Grammaticalization. Cambridge: Cambridge University Press.