1. Regional pulmonary function studied with Xenon133 in patients with bronchial asthma;Bentivoglio, L.G.; Beerel, F.; Bryan, A.C.; Stewart, P.B.; Rose, B.; Bates, D.V.;J. clin. Invest,1963
2. A new method for measuring airway resistance in man using a body plethysmograph;DuBois, A.B.; Botelho, S.Y.; Comroe, Jr, J.H.;J. clin. Invest,1956
3. Laennec, R. T. H. (1819). De l'Auscultation Mediate, vol. 1, p. 158. Brosson and Chaude, Paris.
4. Breath sounds and distribution of pulmonary ventilation;Leblanc, P.; Macklem, P.T.; Ross, W.R.D.;Amer. Rev. resp. Dis,1970
5. Breath sounds in emphysema;Nairn, J.R.; Turner-Warwick, M.;Brit. J. Dis. Chest,1969