These professional organizations are excellent sources for research. They often have student memberships, too!
These resources have been hand selected to assist with your Mathematics Research.
While it may seem easier to do a web search for information rather than use a library database, you need to critically evaluate web sites. While there are numerous web pages that describe how to evaluate a web site, here are a few that you may find useful:
Evaluation Criteria: The Good, The Bad & The Ugly: Why It's a Good Idea to Evaluate Web Sources
Evaluating Web Pages: Techniques to Apply & Questions to Ask