Bibliographies and encyclopedias are wonderful starting points, but new research is published every day. Searching the library catalog and the article indexes (such as RILM) will uncover this new research.
How can you find more journal articles on your topic than what is listed in the Grove bibliographies? Search these resources for citations, and click on the "Find it @FSU" icon or text to see if an electronic copy is available. These resources are great for articles published in the 19th-21st centuries.