TY  - RPRT
TI  - Testing for omitted variables and non-linearity in regression models for longitudinal data.
AU  - M Palta
AU  - T J Yao
AU  - R Velu
PY  - 1994
DO  - 10.1002/sim.4780132104
UR  - https://pubmed.ncbi.nlm.nih.gov/7846421/
ID  - 7846421
ER  -