1. Ahonen, T., Moore, A.: Communities Dominate Brands:Business and Marketing Challenges for the 21st Century. FutureText, London, UK (2005)
2. Berger, J., Milkman, K.: Social transmission, emotion, and the virality of online content. Wharton Research Paper (2010)
3. Boyd, D., Golder, S., Lotan, G.: Tweet, tweet, retweet: Conversational aspects of retweeting on twitter. In: Hawaii Int. Conf. on System Sciences, pp. 1–10 (2010)
4. Bradley, M.M., Lang, P.J.: Affective norms for English words (ANEW): Stimuli, instruction manual, and affective ratings. Technical report, Center for Research in Psychophysiology, University of Florida, Gainesville, Florida (1999)
5. Dobele, A., Lindgreen, A., Beverland, M., Vanhamme, J., Vanwijk, R.: Why pass on viral messages? because they connect emotionally. Business Horizons 50(4), 291–304 (2007)