Another literature review came out in December 2011. The Social Ecology of Adolescent-Initiated Parent Abuse: A Review of the Literature, by Jun Sung Hong, Michael J. Kral, Dorothy L. Espelage and Paula Allen-Meares, is available on line. The abstract indicates that it focusses on context and risk factors, and suggests further avenues for research.
I plan in the near future to create a separate page here for links to articles as I become aware of them, and also a page dedicated to resources. Watch out for these exciting developments!