TY  - RPRT
TI  - Permanent retention with a nonparallel pin retainer.
AU  - G Andreasen
AU  - W W Johnson
PY  - 1970
DO  - 10.1016/s0002-9416(70)90222-8
UR  - https://pubmed.ncbi.nlm.nih.gov/5265010/
ID  - 5265010
ER  -