1. Birgisdottir K (2013) Gender differences in rates of concurrent alcoholism with major depression generalized anxiety. (In Icelandic). Kynjamunur samsláttar alkóhólisma við þunglyndi og almenna kvíðaröskun. Unpublished BS thesis, University of Iceland
2. Directorate of Health (2003) Alcohol and other substances of abuse: various statistics. (Áfengi og önnur vímuefni: ýmsar tölulegar upplýsingar). Report of the council on the prevention of alcohol and drug abuse (Áfengis og vímuefnaráð). Reykjavík, Iceland
3. Directorate of Health (2012) Smoking among Icelanders 1989–2012 electronic version. (In Icelandic: Reykingar Íslendinga 1989–2012 [Rafræn útgáfa].
http://www.landlaeknir.is/
4. Hasin DS, Stinson FS, Elizabeth Ogburn E, Bridget F, Grant BF (2007) Prevalence, correlates, disability, and comorbidity of DSM-IV alcohol abuse and dependence in the United States: results from the national epidemiologic survey on alcohol and related conditions. Arch Gen Psychiatry 64(7):830–842. doi:10.1001/archpsyc.64.7.830
5. Kaye S, Darke S (2012) The diversion and misuse of pharmaceutical stimulants: what do we know and why should we care? Addiction 107:467–477