[Identification of distortion due to misclassification and selection errors in studies of analytic epidemiology. A bibliographic review]. Ronco G, Biggeri A. Epidemiol Prev. 1988 Sep;10(36):20-8. PMID: 2978147
Epidemiology and the internet. Rothman KJ, Cann CI, Walker AM. Epidemiology. 1997 Mar;8(2):123-5. PMID: 9229201