TY  - RPRT
TI  - Upright versus upside-down faces: how interface attractiveness varies with orientation.
AU  - K H Bäuml
PY  - 1994
DO  - 10.3758/bf03213895
UR  - https://pubmed.ncbi.nlm.nih.gov/7971117/
ID  - 7971117
ER  -