1. “20 Years Ago Today: Brookfield Zoo Gorilla Helps Boy Who Fell into Habitat.” Chicago Tribune. August 15, 2016. Available online: http://www.chicagotribune.com/news/ct-gorilla-saves-boy-brookfield-zoo-anniversary-20160815-story.html.
2. Obesity Linked to Grandparental Diet: Mice Eating High-Fat Foods Confer Changes on at Least Two Subsequent Generations.;Nature,2008
3. Adams, Glenn, Joseph Adonu, and Stephanie Anderson. “The Cultural Grounding of Closeness and Intimacy.” In Handbook of Closeness and Intimacy, edited by Debra J. Mashek and Arthur Aron, 321–342. New York: Psychology Press, 2004.