@article{Yau2001,
author = {Yau, K.K.W.},
title= {Multilevel Models for Survival Analysis with Random Effects},
year = {2001},
doi = {10.1111/j.0006-341X.2001.00096.x},
journal = {Biometrics},
volume = {57},
number = {1},
pages = {96--102},
}