1. Detection of drugs of abuse in urine, as an index of drug abuse;Svenneby;Tidsskr. Nor. Laegeforen.,1980
2. Experience with laboratory tests for detection of abused drugs in urine during treatment of young drug addicts at the Oslo Psychiatric Clinic;Tuset;Tidsskr. Nor. Laegeforen.,1980
3. The human urinary excretion pattern of morphine and codeine following the consumption of morphine, opium, codeine and heroin;Yong;Bull. Narc.,1977