Susser, M. 1973. Causal Thinking in the Health Sciences: Concepts and Strategies ofEpidemiology. New York: Oxford University Press.
———. 1977. Judgment and causal inference: Criteria in epidemiologic studies. AmericanJournal of Epidemiology 105(1):1–15.
———. 1988. Falsification, verification, and causal inference in epidemiology: Reconsideration in the light of Sir Karl Popper's philosophy. In Causal Inference. Edited by K. J. Rothman. Chestnut Hill, MA: Epidemiology Resources. Pp. 33–58.
———. 1991. What is a cause and how do we know one? A grammar for pragmatic epidemiology. American Journal of Epidemiology 133(7):635–648.
Teasdale, G., and B. Jennett. 1974. Assessment of coma and impaired consciousness. A practical scale. Lancet 2(7872):81–84.
Wegman, D. H., N. F. Woods, and J. C. Bailar. 1997. Invited commentary: How would we know a Gulf War syndrome if we saw one? American Journal of Epidemiology 146(9):704–711.