TY  - RPRT
TI  - Cricopharyngeal ring. A case report.
AU  - W A Cumming
AU  - M Akhtar
AU  - C Ferentzi
AU  - W Feteih
PY  - 1986
DO  - 10.1007/bf02386642
UR  - https://pubmed.ncbi.nlm.nih.gov/3951900/
ID  - 3951900
ER  -