@article{Steele2004,
author = {Steele, F. and Goldstein, H. and Browne, W.},
title= {A general multilevel multistate competing risks model for event history data, with an application to a study of contraceptive use dynamics},
year = {2004},
doi = {10.1191/1471082X04st069oa},
journal = {Statistical Modelling },
volume = {4},
number = {2},
pages = {145--159},
}