См.: Nicholas A. Christakis, James H. Fowler (2007). The Spread of Obesity in a Large Social Network over 32 Years, New England Journal of Medicine, 357, 370–379. Цитата взята из Gina Kolata (June 25, 2007), Study Says Obesity Can Be Contagious, New York Times. См. также: Christakis, Fowler Connected: The Surprising Power of Our Social Networks and How They Shape Our Lives, New York: Little, Brown and Company (2009).
