Wålinder , O., I. Bergström, G. Boethius, and L. Ugander. “Studies of Drug-Treated Diabetes in the County of Jämtland, Sweden, Based on Prescription of Insulin and Oral Antidiabetic Drugs”. Upsala Journal of Medical Sciences, vol. 91, no. 1, Mar. 1986, pp. 89-98, doi:10.3109/03009738609178494.