TY  - RPRT
TI  - Estimating equations with nonignorably missing response data.
AU  - Y G Wang
PY  - 1999
DO  - 10.1111/j.0006-341x.1999.00984.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11315039/
ID  - 11315039
ER  -