DOI:
10.1055/s-00000036
Laryngo-Rhino-Otologie
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References
Zijlstra RJ, Mahieu HF, van Lith-Bijl JT, Schutte HK.
Aerodynamic properties of the low-resistance Groningen button.
Arch Otolaryngol Head Neck Surg 1991; 117: 657-661
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