Finding literature on a specific topic is one of the most important skills to learn, and it's more an art than a science. It requires persistence and creativity. You need to know about the appropriate tools and databases, and know how to use them effectively. This is much more than just "googling" some words!
Whether you have an assigned topic, and you need to narrow down to a manageable research question or start forming a hypothesis, or you are free to choose any topic you want, the first step in narrowing that topic is researching sources for background information.
First, you can search popular sources for topics or background information. Popular sources differ from scholarly sources in that they are written for a non-specialist audience. Credible science writing is based on scholarly research. The advantage of these sources is that they often discuss the application of the research in ways that the scholarly literature does not. Here are some suggestions for topics in mathematics:
You can also browse through scholarly journals when looking for a topic. This will help you refine your topic and find sources that you can use in your project. Here are some links that will help you find relevant journals:
As you browse through these sources, be sure to note: