1. American Anthropological Association (1996). American anthropological association statement of race.(http://www.virginia.edu/~woodson/courses/aas102/articles/aaa_race.html).
2. Maternal stress and obstetric and infant outcomes;Austin;Australia New Zealand Obstetrics and Gynaecology,2000
3. Preterm birth research;Beukens;Paediatric Perinatal Epidemiology,2001
4. Perception of race and ethnicity;Brown;Journal of Social Behavior and Personality,1998
5. The role of lifestyle in preventing low birth weight;Chomitz;The Future of Children,1995