TY  - RPRT
TI  - Measuring facial expressions by computer image analysis.
AU  - M S Bartlett
AU  - J C Hager
AU  - P Ekman
AU  - T J Sejnowski
PY  - 1999
DO  - 10.1017/s0048577299971664
UR  - https://pubmed.ncbi.nlm.nih.gov/10194972/
ID  - 10194972
ER  -