TY  - RPRT
TI  - Flexible maximum likelihood methods for bivariate proportional hazards models.
AU  - Wenqing He
AU  - Jerald F Lawless
PY  - 2003
DO  - 10.1111/j.0006-341x.2003.00098.x
UR  - https://pubmed.ncbi.nlm.nih.gov/14969462/
ID  - 14969462
ER  -