References
- Siggaard O., Andersen K., Engel K., Jørgensen P., Astrup. A micro method for the determination of pH, carbon dioxide tension, base excess and standard bicarbonate in capillary blood. Scandinav. J. Clin. & Lab. Investigation 1960; 12: 172
- Vogel A. I. Textbook of Quantitative Inorganic Anaysis. Theory and PracticeII ed. Longmans, Green & Co, London 1954; p. 784 f. f.