1. 1 L. Larsson, Incidence and Prevalence of Asthma. Relation to Differences in Utilisation of Asthma Drugs Between Two Neighbouring Swedish Provinces . Medical Dissertations No. 427, ISSN 0346-6612. Umea, Sweden: Umea University, 1995 .
2. 2 H. FormgrenOmfattning av allergi och annan overkanslighet. Vetenskaplig kunskapssammanstallning(in Swedish). Translation:The Scope of Allergies and Hypersensitivity. Scientific Compilation of Knowledge. Stockholm: Institute of Public Health, 1994 .
3. 3 L Jacobson, and B. LindgrenAstma. De Samhallsekonomiska Kostnaderna (in Swedish).Translation:Asthma. The Socioeconomic Costs. ISSN 1103-3312. Malmo, Sweden: Department of Community Medicine (Malmo). Department of Economic Research, Lund Univeritet, 1995 .
4. The Economic Costs of Asthma
5. The Cost of Asthma