There are many thousands of publications that might be relevant to you, so a comprehensive "list" wouldn't be much help. Resources like Google Scholar and your university's library search tools (including various databases) can be helpful for locating articles, though. What lx said works best-- find several sources you like, then look through the bibliographies.
Beyond that, I'd like to ask why you want to do this-- do you want to know about a particular theory (you'll need to pick one from the many that exist) or do you want to see previous analyses of Dravidian? In general, you won't find a huge amount of overlap between the two, but you can connect those lines of research if you'd like.