TY  - RPRT
TI  - Count data models for demographic data.
AU  - R Winkelmann
AU  - K F Zimmermann
PY  - 1994
DO  - 10.1080/08898489409525374
UR  - https://pubmed.ncbi.nlm.nih.gov/12287090/
ID  - 12287090
ER  -