TY  - RPRT
TI  - Segmental motion and instability.
AU  - I A Stokes
AU  - J W Frymoyer
PY  - 1987
DO  - 10.1097/00007632-198709000-00009
UR  - https://pubmed.ncbi.nlm.nih.gov/2961083/
ID  - 2961083
ER  -