TY  - RPRT
TI  - Eleven-year study of hydroxyapatite implants.
AU  - R A Williams
PY  - 1990
DO  - 10.1016/0022-3913(90)90247-a
UR  - https://pubmed.ncbi.nlm.nih.gov/2158557/
ID  - 2158557
ER  -