TY  - RPRT
TI  - Facial expressions can be modelled mathematically.
AU  - M Thornton
AU  - I Pilowsky
PY  - 1982
DO  - 10.1192/bjp.140.1.61
UR  - https://pubmed.ncbi.nlm.nih.gov/7059741/
ID  - 7059741
ER  -