3Molho M, Shulimzon T, Benzaray S, et al.Importance of inspiratory load in the assessment of severity of airways obstruction and its correlation with CO2 retention in chronic obstructive pulmonary disease. Am Rev Respir Dis,1993;147(1) : 45.
4Scichilone N,Permutt S, Togias A. The lack of the bronchoprotective and not the bronchodilatory ability of deep inspiration is associated with airway hyperresponsiveness. Am J Respir Crit Care Med,2001;163(2) : 413.