There’s a recent annotated bibliography available on CompFAQs, which I found through a CompPile search for ESL:
For folks who don’t know them, CompFAQs and CompPile (http://comppile.org) are excellent resources for scholarly lit reviews related to all things composition and rhetoric. The latter includes a searchable bibliography with synonyms to help track down the terms of art in the field.
There is also the TESOL Journal: http://www.tesol.org/read-and-publish/journals/tesol-journal
