1. Adler R (1978) Therapieresistente Schmerzen. Medikamentöse Therapie des Karzinomschmerzes. Schweiz med Wschr 108: 456
2. Arner S, Bolund C, Raue A, Rönnbäck L (eds) (1982) Narcotic analgesics in the treatment of Cancer and postoperative pain. Acta anaesth Scand (Suppl 74) Vol 26
3. Biniek E (Hrsg) (1978) Drogenabhängigkeit. Wiss Buchgesellsch, Darmstadt
4. Bonica JJ, Ventafridda V (1979) Advances in pain research and therapy, Vol II. Raven, New York
5. Catalano RB (1975) The medical approach to management of pain caused by Cancer. Seminars in Oncology 2:379