Smith, L. K., Manktelow, B. N., Draper, E. S., Boyle, E. M., Johnson, S. J., & Field, D. J. (2014). Trends in the incidence and mortality of multiple births by socioeconomic deprivation and maternal age in England: Population-based cohort study. BMJ Publishing Group.

Smith, Lucy K., Bradley N. Manktelow, Elizabeth S. Draper, Elaine M. Boyle, Samantha J. Johnson, and David J. Field. Trends in the Incidence and Mortality of Multiple Births By Socioeconomic Deprivation and Maternal Age in England: Population-based Cohort Study. BMJ Publishing Group, 2014.

Smith, Lucy K., et al. Trends in the Incidence and Mortality of Multiple Births By Socioeconomic Deprivation and Maternal Age in England: Population-based Cohort Study. BMJ Publishing Group, 2014.