TY  - RPRT
TI  - Describing head shape with surface harmonic expansions.
AU  - C Purcell
AU  - T Mashiko
AU  - K Odaka
AU  - K Ueno
PY  - 1991
DO  - 10.1109/10.133214
UR  - https://pubmed.ncbi.nlm.nih.gov/2066146/
ID  - 2066146
ER  -