Approaches to the medium emerge from a number of disciplines, as the following listings indicate.
The first, Comics Scholars Recommend incorporates books, journals and websites. It covers a wide historical period and a number of national comics traditions.
It was drawn together from a discussion of personal 'must reads' in comics scholarship offered by members of the Comics Scholars' Discussion List in June 2009.
It does not offer a canon (or canons), but a range of ways into exploring the medium, ones which list members suggest will vary according to the interests of the individual entering the field.
An example of individual interests and development is shown by the bibliography of the works which helped my own journey into the field, with my particular interests in British girls and their comics, which are to be found in the second listing included below entitled Girl's Own Story. There are some titles that appear in both lists.
In addition, there is a section which outlines some of the periodicals involved in publishing scholarly articles about comics, both those focused on comics and those that regularly feature comics-related material.
Finally, my own publications, predominantly, but not solely, about British girls' comics, can be found via the Articles and Chapters about Comics link.