Google scholar is a good resource for finding who has cited any given source. Search for a book or article in it and then look for the "Cited by" and a number beneath each of the search results. If you click that, you can often find very important information about that source, and develop your research. NOTE!!! Not everything you find on Google Scholar is from a peer-reviewed, reputable location. Be sure to do some research about the resources themselves. Use Google Scholar in conjunction with other resources.
The Library has a Senior Thesis page with many useful links. If you click on "Search the Senior Thesis Archive" you will see a drop down menu with various options for searching previous theses. You could search using a keyword. You could browse by department (please note: this selection will include hardcopy theses). I recommend clicking on "Browse the Digital Thesis Archive" and choosing the department of your choice. Click on the bottom for "View All Submissions" for every electronic thesis available from that department. There are also award winning theses available for reading.
Happy reading!