1. Munson B Vujicic M Number of practicing dentists per capita in the United States will grow steadily http://www.ada.org/~/media/ADA/Science%20and%20Research/HPI/Files/HPIBrief_0616_1.pdf
2. Wall T Vujicic M U.S. dental spending up in 2015 https://www.ada.org/~/media/ADA/Science%20and%20Research/HPI/Files/HPIBrief_1216_2.pdf?la=en
3. Federal Reserve Bank of St. Louis and United States Department of Commerce, Bureau of Economic Analysis Real personal consumption expenditures: Health care: Outpatient services: Dental services (Chain Type Quantity Index) [DDENRA3A086BEA], retrieved from FRED, Federal Reserve Bank of St https://fred.stlouisfed.org/series/DDENRA3A086NBEA
4. American Dental Association Health Policy Institute https://www.ada.org/~/media/ADA/Science%20and%20Research/HPI/Files/HPIBrief_1217_1.pdf?la=en
5. American Dental Association Health Policy Institute: Dental earnings and busyness in the U.S http://www.ada.org/~/media/ADA/Science%20and%20Research/HPI/Files/HPIgraphic_1117_1.pdf?la=en