The following have been added to the Zotero Group for Ancient World Open Bibliographies and the Ancient World Open Bibliographies Wiki.
Fran Titchener for the International Plutarch Society, hosted at Utah State University
Last updated January 5, 2011.
This is a comprehensive bibliography including books and articles in multiple languages. It is structured as lists of works organized alphabetically by author, in several large .pdf files.
Bibliography on Plutarch
Kenneth Mayer, formerly Dept. of Classics, University of Texas
No last update date; latest works included are 1997.
This is a selected but detailed bibliography, including books and monographs in multiple languages. It is structured with sections on basic works, editions, the second sophistic, individual Lives, religion, influence, and more; a few of the works listed also have annotations.