1. Brazy JE, Lewis DV, Mitnick MH, Jöbsis van der Vliet FF (1985) Noninvasive monitoring of cerebral oxygenation in preterm infants: preliminary observations. Pediatrics 752: 217–225
2. Cady EB, Dawson MJ, Hope PL et al. (1983) Non-invasive investigation of cerebral metabolism in newborn infants by phosphorus nuclear magnetic resonance spectroscopy. Lancet (14.5.1983): 1059–1062
3. Chance B, Williams GR (1955) Respiratory enzymes in oxidative phosphorylation. J Biol Chem 217:409
4. O’Connor Mc, Hytten FE (1979) Measurement of fetal transcutaneous oxygen tension: problems and potentials. Br J Obstet Gynaecol 86: 86
5. Dudenhausen JW (1984) Fetalblutanalyse zur subpartualen Überwachung des Feten. In: Duden hausen JW (Hrg) Praxis der Perinatalmedizin. Thieme, Stuttgart