1. Catatonia, or tension insanity: a clinical form of psychic illness [Die Katatonie oder das Spannungsirresein. Eine klinische Form psychischer Krankheit] [In German];Kahlbaum,1874
2. Psychiatry: a textbook for students and physicians [Psychiatrie: ein Lehrbuch für Studirende und Aerzte] [In German];Kraepelin,1896
3. Catatonia: a prospective clinical study;Abrams;Arch Gen Psychiatry,1976
4. Catatonia: retarded and excited types;Morrison;Arch Gen Psychiatry,1973
5. The catatonic syndrome;Gelenberg;Lancet,1976