Mock Trial Help! Need 3 Precedent Cases! PLEASE HELP!?

Hello, I am having a major problem with a school project I am working on. We were igned a case that had a major impact on civil rights in our nation. We must also find 3 precedent (Prior cases that have an influence on the ruling of the current trial). The case I am working on is: University Of California Regents V. Bakke 438 U.S. 265 (1978). This is a particularly hard case because this is one of the first case dealing with civil rights that focuses on the concept of affirmative action. If anyone knows or can find at least one precedent case it would help me out so much. Thank you :)