Literature Resource Center
Literature Resource Center has literary criticism, biographies, and overviews of specific works.
For example, type in Henrik Ibsen and find:
565 critical articles
100 work overviews
76 primary sources
That is a ton of information! You can't go wrong with Literature Resource Center!
Find it on the library website www.roch.edu/library.
Pick "Articles and More...", then "Databases by Title". http://www.roch.edu/library/byTitle.php#L
Available both on and off campus.