1. Morphology of the bronchial tree in man;Horsfield;J Appl Physiol,1968
2. Morphometry of the Human Lung;Weibel,1963
3. Site and nature of airways obstruction in chronic obstructive lung disease;Hogg;N Engl J Med,1968
4. Resistance of central and peripheral airways measured by a retrograde catheter;Macklem;J Appl Physiol,1967
5. Proposed nomenclature for quantifying subdivisions of the bronchial wall;Bai;J Appl Physiol,1994