TY  - RPRT
TI  - Closed loop problems in biomechanics. Part I--a classification system.
AU  - C L Vaughan
AU  - J G Hay
AU  - J G Andrews
PY  - 1982
DO  - 10.1016/0021-9290(82)90252-4
UR  - https://pubmed.ncbi.nlm.nih.gov/7096373/
ID  - 7096373
ER  -