1. C. Allgulander(1978 ) Dependence on sedative and hypnotic drugs: a comparative clinical and social study , Acta Psychiatric Scandinavica, Suppl 270 .
2. A 4-6-year follow-up of 50 patients with primary dependence on sedative and hypnotic drugs
3. M. Aasberg, C. Ferris, and D. Schalling(1978 ) The CPRS: development and applications of a psychiatric rating scale , Acta Psychiatric Scandinavica, Suppl 271 .
4. Dependence on Sedative-hypnotics, 553 .