Weibel, E.R.: Morphometry of the Human Lung. New York, Academic Press Inc., 1963.
2.
Ledbetter, M.K. , Bruck, E., and Farhl, L.E.: Perfusion of the underventilated compartment of the lungs in asthmatic children. J. Clin. Invest.43: 2233, 1964.
3.
Robinson, A.E. , Goodrich, J.K., and Spock, A.: Inhalation and perfusion radionuclide studies of pediatric chest disease. Radiology93: 1123, 1969 .
4.
Blaha, V., Nikodymowa, L., Kolinska, J. and Krepela, K.: Examination of pulmonary ventilation by a gamagraphic method in patients with pulmonary emphysema and in chronic pulmonary diseases in children, K. Fellinger, and R. Hofer , Eds. Radioaktive Isotope in Klinik und Forschung, 9: 308, 1970.