@article{Datta2001,
author = {Datta, S. and Satten, G.A.},
title= {Validity of the Aalen-Johansen estimators of stage occupation probabilities and Nelson-Aalen estimators of integrated transition hazards for non-Markov models},
year = {2001},
doi = {10.1016/S0167-7152(01)00155-9},
journal = {Statistics & Probability Letters},
volume = {55},
number = {4},
pages = {403--411},
}