TY  - RPRT
TI  - Internal jugular valves: competent or incompetent?
AU  - S T Sum-Ping
PY  - 1994
DO  - 10.1213/00000539-199406000-00001
UR  - https://pubmed.ncbi.nlm.nih.gov/8198255/
ID  - 8198255
ER  -