1. Chalfen R (1987) Snapshot versions of life. Bowling Green State University Popular Press, Bowling Green, OH
2. Chalfen R (1979) Photograph’s role in tourism: some unexplored relationships. Ann Tour Res 6(4):435–447
3. Chalfen R (1975) Introduction to the study of non-professional photography as visual communication. In: Folklore forum bibliographic and special series. Saying cheese: studies in folklore and visual communication, vol. 13, pp. 19–25
4. Good J (2011) How many photos have ever been taken? 1000 memories blog. Available at: http://blog.1000memories.com/94-number-of-photos-ever-taken-digital-and-analog-in-shoebox (Accessed December 2012)
5. Whittaker S, Bergman, O, Clough P (2010) Easy on that trigger dad: a study of long term family photo retrieval. Pers Ubiquit Comput 14. 1 (January 2010). 31–43. doi: 10.1007/s00779-009-0218-7