Normand, S. T., Sykora, K., Li, P., Mamdani, M., Rochon, P. A., & Anderson, G. M. (2005). Readers guide to critical appraisal of cohort studies: 3. Analytical strategies to reduce confounding. BMJ Publishing Group Ltd.

Normand, Sharon-Lise T., Kathy Sykora, Ping Li, Muhammad Mamdani, Paula A. Rochon, und Geoffrey M. Anderson. Readers Guide to Critical Appraisal of Cohort Studies: 3. Analytical Strategies to Reduce Confounding. BMJ Publishing Group Ltd, 2005.

Normand, Sharon-Lise T., et al. Readers Guide to Critical Appraisal of Cohort Studies: 3. Analytical Strategies to Reduce Confounding. BMJ Publishing Group Ltd, 2005.