TY  - RPRT
TI  - Unstable equilibrium behaviour in collapsible tubes.
AU  - C D Bertram
PY  - 1986
DO  - 10.1016/0021-9290(86)90109-0
UR  - https://pubmed.ncbi.nlm.nih.gov/2936743/
ID  - 2936743
ER  -