@article{Chi2006,
author = {Chi, Y.  and Ibrahim, J. G. },
title= {Joint models for multivariate longitudinal and multivariate survival data},
year = {2006},
doi = {10.1111/j.1541-0420.2005.00448.x},
journal = {Biometrics},
volume = {62},
number = {2},
pages = {432--445},
}