13. Preišegolavičiūtė E, Leskauskas D, Adomaitienė V. Associations of quality of sleep with lifestyle factors and profile of studies among Lithuanian students. Medicina (Kaunas). 2010; 46(7): 482–9.
14. Andrade L, Caraveo-Anduaga J, Berglund P. Crossnational comparisons of the prevalence and cor relates of mental disorders. WHO International Con sortium in Psychiatric Epidemiology. Bull World Health Organ. 2000; 78: 413–26.
15. Cole DA, Peeke LG, Martin JM, et al. A longitudinal look at the relation between depression and anxiety in children and adolescents