1. Diffusion of innovation in medicine: a problem of continuing medical education;McLaughlin;J. Med. Educ.,1965
2. Maintaining contact with medical knowledge;Rutstein;New England J. Med.,1961
3. Factors influencing the selection of pharmaceutical products;Caplow;J. Marketing,1954
4. The Effectiveness of Pharmaceutical Promotion;Ferber,1958
5. Attitudes of U.S. Physicians Toward the American Pharmaceutical Industry;Gaffin Ben and Associates,1959