Subject Specific:
See also the subject specific databases in the fields to which your work is applied, e.g. biology, physics, etc.
Publisher Specific:
These are limited to one or two publishers. Be mindful of what you may be missing!
Multidisciplinary:
Already know which article you need? Enter the citation in the Find Items by Citation form to access it.
For access to e-books, online journals, databases:
See also the preprint servers in the fields to which your work is applied, e.g: biology.