Lieb, R. Max Planck Institute of Psychiatry, Max Planck Society;
Wittchen, H.-U., Lieb, R., Schuster, P., & Oldehinkel, T. (1999). When is onset? Investigations into early developmental stages of anxiety and depressive disorders. In J. L. Rapoport (Ed.), Childhood onset of "adult" psychopathology, clinical and research advances (pp. 259-302). Washington DC: American Psychiatric Press.