7Yen C, Tang T, Yen J, et al. Symptoms of problematic cellu- lar phone use, functional impairment and its association with depression among adolescents in Southern Taiwan. Journal of Adolescence, 2009, 32(4): 863-873.
8Jenaro C, Flores N, G6mez-Vela M, et al. Problematic inter- net and cell-phone use: Psychological, behavioral, and he- alth correlates. Addiction Research and Theory, 2007, 15(3): 309-320.
9Kasesniemi E, Rautiainen P. Mobile culture of children and teenagers in Finland. Perpetual Contact, Cambridge Univer- sity Press, 2002. 170-192.
10Bianchi A, Phillips JG. Psychological predictors of problem mobile phone use. Cyberpsychology and Behavior, 2005, 8 (1): 39-51.