1. Gordy, E. andDrabkin, D. L. (1957) Spectrophotometric studies XVI: determination of the oxygen saturation of blood by a simplified technique available to standard equipment.J. Biol. Chem.,227, 285–296.
2. Horecker, B. L. (1943) The absorption spectra of haemoglobin and its derivatives in the visible and near infra-red regions.J. Biol. Chem.,148, 173–183.
3. Le Souëf, P. N., Morgan, A. K., Soutter L. P., Reynolds, E. O. R. andParker, D. (1978) Continuous comparison of transcutaneous and arterial oxygen tension in newborn infants with respiratory illnesses.Acta Anaesth. Scand. Suppl.,68, 91–97.
4. Nakajima, S., Hirai, Y., Takase, H., Kuse, A., Aoyagi, S., Kishi, M. andYamaguchi, K. (1975) New pulsed-type earpiece oximeter.Kokyu to Junkan,23, 709–713.
5. Nilsson, N. J. (1960) Oximetry.Physiol. Rev.,40, 1–26.