TY  - RPRT
TI  - Approximate standard errors in semiparametric models.
AU  - M Durban
AU  - C A Hackett
AU  - I D Currie
PY  - 1999
DO  - 10.1111/j.0006-341x.1999.00699.x
UR  - https://pubmed.ncbi.nlm.nih.gov/11314995/
ID  - 11314995
ER  -