General databases contain content from a variety of subject areas and publication types. This will allow you to look at your research from a wide perspective. Be sure to use the search refinements each database may offer including: date, document type, and source type.
Unlike the general databases, subject-specific databases generally focus solely on journal articles as a publication type and do not have a broad, multidisciplinary approach. This brief list contains links to a few of the core databases for literature-based research. For deeper literature-based research, visit the subject guides or contact the subject librarian.
In addition to looking at graphic novels and comics from a literary perspective, it is helpful to broaden your perspective and venture into other disciplines.