Inside Housing is the best online journal for social housing issues in the country.
Regarding your literature review, I would stay tuned to this website as well as visit the websites of housing associations, ALMOs, local authority housing departments, the Audit Commission and the TSA for more information on the recent performance of social housing providers.
Financial statements, annual reviews, improvement plans as well as other audit documents will give you what you need to complete your dissertation.
I am afraid a lot of the text books will only scratch the surface of what is going on due to the length of time it takes to publish a book.
Best of luck with your dissertation and I hope you find the answers you are searching for.