Earlier quoted context omitted.
That link says access denied.
Guess it went down. This one lacks the outlined breakdown at the end, but try the pdf link here: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.516.... EDIT: If you want a really deep dive, you can also check out "African American English: A Linguistic Introduction" from Cambridge University press: www.cambridge.org/us/academic/subjects/languages-linguistics/sociolinguistics/african-american-english-linguist…
That being said, I think this research emphasizes that AAVE is anything but standardized. That's not meant as a pejorative statement: it's just acknowledging that, like most languages in history, AAVE has not gone through a process of codification and standardization to formalize it.