The following has been added to the Zotero Group for Ancient World Open Bibliographies and the Ancient World Open Bibliographies Wiki.
Greek Authors (Other bibliographies of Homer at AWOB: http://ancientbibliographies.libs.uga.edu/wiki/Greek_Authors#Homer)
Centre d’Etudes homériques, Grenoble (with other institutions)
Updated as of 2015.
This online database has simple and advanced searches, by author and keyword. Its scope is comprehensive, judging by the contents, which include books and articles in several languages. There is no scope note; the years one can search on are listed as 1991-2105. Interface is in French (remember, Google does a decent job of translating web pages if you need that service).