1. Norwegian Medicines Agency http://www.legemiddelverket.no/spc
2. Rønning M Berg CL Litleskare I et al. Drug Consumption in Norway http://www.legemiddelforbruk.no
3. Governmental White Paper http://www.regjeringen.no/nb/dep/hod/dok/regpubl/stmeld/19961997/st-meld-nr-25_1996-97.html?id=191086
4. Governmental White Paper http://www.regjeringen.no/nb/dep/hod/dok/regpubl/stprp/19971998/Stprp-nr-63-1997-98-.html?id=201915
5. Governmental White Paper http://www.regjeringen.no/nb/dep/hod/dok/regpubl/stmeld/20042005/Stmeld-nr-18-2004-2005-.html?id=406517