Effect of gas density and expiratory flow on "closing volume".
Kryger M, Martin R, Macklem P, Anthonisen N. Effect of gas density and expiratory flow on "closing volume". Journal Of Applied Physiology 1974, 37: 831-834. PMID: 4436215, DOI: 10.1152/jappl.1974.37.6.831.Peer-Reviewed Original Research