TY  - RPRT
TI  - Orthodontic force systems: technical refinements for increased efficiency.
AU  - R A Hocevar
PY  - 1982
DO  - 10.1016/0002-9416(82)90282-2
UR  - https://pubmed.ncbi.nlm.nih.gov/6960693/
ID  - 6960693
ER  -