I added two items to my Comprehensive Bibliography of Hellenistic Greek Linguistics today. Both address the use of Greek demonstratives. The paper by Runge is available online (as a PDF download).
Levinsohn, Stephen H. “Towards a Unified Linguistic Description of οὗτος and ἐκεῖνος.” Paper presented at Biblical Greek and Linguistics Section of the SBL Annual Meeting, Atlanta, GA. 2003.
Runge, S. E. “The Exegetical Significance of Cataphoric Pronouns in Luke’s Gospel.” Paper presented at the ETS Northwest Regional Meeting, Salem, OR. 2007.
http://www.logos.com/media/academic/runge/cataphoric_pronouns.pdf