Julvez J, Ribas-Fito N, Torrent M, Forns M, Garcia-Esteban R, Sunyer J. Maternal smoking habits and cognitive development of children at age 4 years in a population-based birth cohort. Int J Epidemiol. 2007 Aug;36(4):825-32. doi: 10.1093/ije/dym107
Austin H, Flanders WD, Rothman KJ. Bias arising in case-control studies from selection of controls from overlapping groups. Int J Epidemiol. 1989 Sep 1;18(3):713-6.
Rothman KJ, Poole C. A strengthening programme for weak associations. Int J Epidemiol. 1988 Dec 1;17(4):955-9.
Zierler S, Theodore M, Cohen A, Rothman KJ. Chemical quality of maternal drinking water and congenital heart disease. Int J Epidemiol. 1988 Sep;17(3):589-94.