Fogel, J., and S. Shlivko. “Singles Seeking a Relationship and Pornography Spam E-Mail: An Understanding of Consumer Purchasing Behavior and Behaviors Antecedent to Purchasing”. Cyberpsychology: Journal of Psychosocial Research on Cyberspace, vol. 4, no. 2, Dec. 2010, p. Article 3, https://cyberpsychology.eu/article/view/4238.