1. Ahmed, A. K., Harness, J. B., andMearns, A. J. (1982): ‘Respiratory control of heart rate’,Eur. J. Appl. Physiol.,50, pp. 95–104
2. Allison, R. D., Holmes, E. L., andNyboer, J. (1964): ‘Volumetric dynamics of respiration as measured by electrical impedance plethysmography’,J. Appl. Phys.,19, pp. 166–173
3. Ashutosh, K., Gilbert, R., Auchincloss, J. H., Erlebacher, J., andPeppi, D. (1974): ‘Impedance pneumograph and magnetometer methods for monitoring tidal volume’,J. Appl. Phys.,37, pp. 964–966
4. Brecher, G. A. (1956): ‘Venous return’ (Grune & Stratton, New York)
5. Challoner, A. V. J. (1979): ‘Photoelectric plethysmography for estimating cutaneous blood flow’in Rolfe, P. (Ed.): ‘Non-invasive physiological measurements’ (Academic Press, London) pp. 125–151