White, Brian. "A Simple and Effective Protein Folding Activity Suitable for Large Lectures." Cell Biology Education 5, no. 3 (2006): 264-69. Accessed July 1, 2015. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1618698/.
Zullo, Andrea. “Emerging and Reemerging Infectious Diseases”. Yale University: Yale-New Haven Teacher’s Institute. / Accessed April 2, 2015.