Consult bibliographies to find a comprehensive list of sources on a specific topic or a selective list of key works on a topic.
For a bibliographical introduction to the Greek and Roman world visit: Bibliotheca Classica Selecta
Includes links to large databases, projects, electronic journals, bibliographies, collections of images, etc.
Gnomon Online. Also known as: Eichstätt Information System for Classical Studies
Indexes books, book articles and some journals in the area of classical studies. Citations with selective articles in full-text.