TY  - RPRT
TI  - External root resorption after bleaching: a case report.
AU  - S al-Nazhan
PY  - 1991
DO  - 10.1016/0030-4220(91)90501-3
UR  - https://pubmed.ncbi.nlm.nih.gov/1745520/
ID  - 1745520
ER  -