Murck, H., Nickel, T., Künzel, H., Antonijevic, I. A., Schill, J., Zobel, A., Steiger, A., Sonntag, A., & Holsboer, F. (2003). State markers of depression in sleep EEG: Dependency on drug and gender in patients treated with tianeptine or paroxetine. Neuropsychopharmacology, 28(2), 348-358.