Köller, Olaf Center for Educational Research, Max Planck Institute for Human Development, Max Planck Society;
Vetter, P. H., Pritzbuer, J. v., Jungmann, K., Kropp, P., & Köller, O. (2001). The validity of the ICD-10 classification of recurrent affective disorders: Do endogenous and psychogenic depressions form a homogenous diagnostic group? Psychopathology, 34, 36-42.