Rozgonjuk, D., Rosenvald, V., Janno, S. and Täht, K. (2016) “Developing a shorter version of the Estonian Smartphone Addiction Proneness Scale (E-SAPS18)”, Cyberpsychology: Journal of Psychosocial Research on Cyberspace, 10(4), p. Article 4. doi: 10.5817/CP2016-4-4.