TY  - RPRT
TI  - Modelling non-demanders in choice experiments.
AU  - Mandy Ryan
AU  - Diane Skåtun
PY  - 2004
DO  - 10.1002/hec.821
UR  - https://pubmed.ncbi.nlm.nih.gov/15067675/
ID  - 15067675
ER  -