TY  - RPRT
TI  - Regression models for unbalanced longitudinal ordinal data: computer software and a simulation study.
AU  - Kai Fun Yu
AU  - Weishi Yuan
PY  - 2004
DO  - 10.1016/j.cmpb.2004.02.006
UR  - https://pubmed.ncbi.nlm.nih.gov/15265618/
ID  - 15265618
ER  -