TY  - RPRT
TI  - Testing the rigidity assumption: a reply to Ullman.
AU  - M L Braunstein
AU  - G J Andersen
PY  - 1986
DO  - 10.1068/p150641
UR  - https://pubmed.ncbi.nlm.nih.gov/3588224/
ID  - 3588224
ER  -