1. Relapse in major depressive disorder;Keller;Arch Gen Psychiatry,1982
2. Recurrence after recovery from major depressive disorder during 15 years of observational follow-up;Mueller;Am J Psychiatry,1999
3. Multiple recurrences of major depressive disorder;Solomon;Am J Psychiatry,2000
4. Manic-Depressive Insanity and Paranoia;Kraepelin,1921
5. Practice Guideline for the Treatment of Patients with Major Depressive Disorder (Revision). Karasu TB, Chair, Work Group on Major Depressive Disorder;Am J Psychiatry,2000