1. Place of chronic insomnia in the course of depressive and anxiety disorders;Ohayon;J Psychiatr Res.,2003
2. Treatment of chronic insomnia by restriction of time in bed;Spielman;Sleep.,1987
3. Evaluation and management of insomnia: An overview;Zorick,2000
4. Mood disorders;Benca,2000
5. Insomnia: Psychological Assessment and Management;Morin,1993