1. American Psychiatric Association (2000) Diagnostic and statistical manual of mental disorders, 4th edn.Text Revision (DSMIV-TR). American Psychiatric Association, Washington DC
2. Arbuckle JL, Wothke W (2005) Amos 6.0 user’s guide. SPSS Inc, Chicago
3. Averbeck M, Leiberich P, Grote-Kusch MT, Olbrich E, Schröder A, Brieger M, Schumacher K (1997) SEL; Skalen zur Erfassung der Lebensqualität. Pearson, Frankfurt am Main
4. Backhaus J, Riemann D (1996) Schlafstörungen bewältigen [Coping with sleeping disorders]. Beltz Psychologie Verlags Union, Weinheim
5. Banks S, Dinges DF (2007) Behavioral and physiological consequences of sleep restriction. J Clin Sleep Med 3:519–528