1. Hughes JMB (1977) Pulmonary circulation and fluid balance In: Widdicombe JG (ed) Respiratory physiology II, Ch 5. University Park Press, Baltimore
2. Keele CA, Neil E, Joels N (1982) Samson Wright's applied physiology, 13 edn Oxford University Press, Oxford, pp 76?79
3. West JB (1977) Blood flow. In: West JB (ed) Regional differences in the lung, Ch 3. Academic Press, New York
4. Wetterer E, Kenner Th (1968) Grundlagen der Dynamik des Arterienpulses. Springer Verlag, Berlin Heidelberg New York