1. An economic evaluation of asthma in the United States;Weiss;N Engl J Med,1992
2. NIH guidelines for the diagnosis and management of asthma. National asthma education program expert panel report, 1991;DHHS publication no. 91–3042.
3. Critical ratios and efficient allocation;Weinstein;J Public Econ,1973
4. Cost-benefit Analysis;Mishan,1976
5. Theory and methods of economic evaluation of health care;Johannesson,1996