1) Broms, P., Iversson, A. and Jonson, B.: Rhinomanometry. Simple equipment. Acta Otolaryngol, 93: 455-460, 1982.
2) Broms, P., Jonson, B. and Lamm, C. J.: Rhinomanometry. A system for numetrical description of nasal airway resistance. Acta Otolaryngol., 94: 157-168, 1982.