Aaien, O.O. (1975). Statistical inference for a family of country processes. Ph.D. Thesis, University of California, Berkeley.
Aaien, O.O. (1978). Non parametric inference for a family of counting processes. Annals of Statistics, 6:701–726.
Aalen, O.O. (1989). A linear regression model for the analysis of life times. Statistics in Medicine, 8:907–925.
Aalen, O.O. (1993). Further results on the non-parametric linear regression model in survival analysis. Statistics in Medicine, 12:1509–1588.
Aalen, O.O. (1994). Effects of frailty in survival analysis. Statistical Methods in Medical Research, 3:227–243.
Agresti, A. (1990). Categorical Data Analysis. John Wiley & Sons, Inc. New York.
Akaike, H. (1974). A new look at statistical model identification. IEEE Transactions on Automatic Control, 19:716–723.
Alioum, A. and Commenges, D. (1996). A proportional hazards model for arbitrarily censored and truncated data. Biometrics, 52:512–524.
Allison P. (1995) Survival Analysis Using the SAS System: A Practical Guide.SAS Institute Inc., Cary, North Carolina.
Allison, P.D. (2001). Missing Data, Sage Publications, Thousand Oaks, CA.
Altshuler, B. (1970). Theory for the measurement of competing risks in animal experiments. Math Bioscience, 6:1–11.
Ambler, G. and Royston, P. (2001). Fractional polynomial model selection procedures: investigating type I error rate. Journal of Statistical Simulation and Computation, 69:89–108.
Andersen, P.K. (1992). Repeated assessment of risk factors ...