Rampey, A. H., Irwin, K. L., Oberle, M. W., Kinchen, S., Lee, N. C., Marsden, A., & Rosero Bixby, L. (1993). The effect of using different reference dates for control exposure measurement on relative risk estimates in a case-control study.

Rampey, Alvin H., Kathleen L. Irwin, Mark W. Oberle, Steven Kinchen, Nancy C. Lee, Anne Marsden, ja Luis Rosero Bixby. The Effect of Using Different Reference Dates for Control Exposure Measurement On Relative Risk Estimates in a Case-control Study. 1993.

Rampey, Alvin H., et al. The Effect of Using Different Reference Dates for Control Exposure Measurement On Relative Risk Estimates in a Case-control Study. 1993.