Neutel, C. Ineke, Svetlana Skurtveit, and Christian Berg. “Benzodiazepine and Z-Hypnotic Use in Norwegian Elderly, Aged 65-79”. Norsk Epidemiologi 22, no. 2 (November 29, 2012). Accessed December 11, 2019. https://www.ntnu.no/ojs/index.php/norepid/article/view/1567.