1. Changing immunization referral patterns among pediatricians and family practice physicians, Dallas County, Texas, 1988;Schulte;Pediatrics,1991
2. Immunization referral practices of pediatricians in the United States;Ruch-Ross;Pediatrics,1994
3. Childhood immunization practices of primary care physicians;Hueston;Arch Fam Med,1992
4. Impact of free vaccine and insurance status on physician referral of children to public vaccine clinics;Zimmerman;JAMA,1997
5. The impact of health care financing on childhood immunization practices;Arnold;Am J Dis Child,1992