Sellick, BA (1961). "Cricoid pressure to control regurgitation of stomach contents during induction of anaesthesia". The Lancet. 2(7199) (7199): 404–406. doi:10.1016/s0140-6736(61)92485-0. PMID13749923.
Sellick, BA (1961). "Cricoid pressure to control regurgitation of stomach contents during induction of anaesthesia". The Lancet. 2(7199) (7199): 404–406. doi:10.1016/s0140-6736(61)92485-0. PMID13749923.