Breslow, N.E. and Day, N.E. (1993) Statistical Methods in Cancer Research, Vol. 1, The Analysis of Case Control Studies, Lyon: IARC Scientific Publication No.32.
Clayton, D. and Hills, M. (1993) Statistical Models in Epidemiology, Oxford Science Publications.
Kleinbaum, D.G., Kupper, L.L. and Morgenstern, H. (1982) Epidemiologic Research, Lifetime Learning Publication.