Many articles are available as preprints or eprints before actual publication. Use one of these databases to find the "gray literature."
When you have a citation (or a partial citation) to a journal article, try this tool. If the Libraries subscribe to the full text of that article online, you'll be linked to it. If we don't, you'll be given other options for acquiring it.
All journals can now be found through a search of the catalog. For best results in finding electronic resources, add the word "online" to the end of your query, e.g. "Physical Review Letters online" or click the EJOURNALS & EBOOKS tab in the Search Box to search for electronic journals.