Williams, Elana. “Tribal Sovereign Immunity As a Defense in Overcoming IPR Challenges of Brand Name Pharmaceutical Patent Validity at PTAB – Effects on the Industry”. Pittsburgh Journal of Technology Law & Policy 18, no. 1 (March 28, 2018). Accessed April 19, 2024. https://tlp.law.pitt.edu/ojs/tlp/article/view/216.