1. Smoking during pregnancy in the 1990s. National Vital Statistics Reports. Vol. 49, no. 7;Mathews,2001
2. Trends in pregnancy-related smoking rates in the United States, 1987–1996;Ebrahim;JAMA,2000
3. Smoking before, during, and after pregnancy;Fingerhut;Am J Public Health,1990
4. Smoking behavior of recent mothers, 18–44 years of age, before and after Pregnancy: United States, 1990;LeClere,1997
5. A clinical trial of change in maternal smoking and its effect on birth weight;Sexton;JAMA,1984