1. Statistical inference for a family of counting processes;Aalen,1976
2. Nonparametric inference for a family of counting processes;Aalen;Annals of Statistics,1978
3. Interaction between life history events: Nonparametric analysis for prospective and retrospective data in the presence of censoring;Aalen;Scandinavian Journal of Statistics,1980
4. An empirical transition matrix for nonhomogeneous Markov chains based on censored observations;Aalen;Scandinavian Journal of Statistics,1978
5. Time-dependent covariates and Markov processes;Andersen,1986