1. The System of Dental Care in Germany;Tiemann,2003
2. Evidence-based dentistry as a basis of prosthetic therapy;Kerschbaum,2000
3. Manning W. G. et al. The Demand for Dental Care - Evidence from a Randomized Trial in Health Insurance, in: Rand - Health Insurance Experiment Series. 1986.
4. Pedersen KM, Pedersen PE. The Demand for Dental Care among Industrial Workers: Construction and Testing of a Structural Model, Working Papers, Odense Universitet, Copenhagen. 1980.
5. Effect of time cost on demand for dental services among adults in Norway in 1975 and 1985;Grytten;Community Dent Oral Epidemiol,1991