[1] L. C. Clark and C. Lyons, “Electrode system for continuous monitoring in cardiovascular surgery”, Annals of the New York Academy of Sciences, Vol. 102, pp.29-45, 1962.
[3] P. Bergveld, “Development of an ion-sensitive solid-state device for neurophysiological measurements”, IEEE Transactions on Biomedical Engineering, Vol. 17, pp.70-71, 1970.
[4] G. G. Guilbault, “Determination of Formaldehyde with an Enzyme-Coated Piezoelectric Crystal Detector”, Analytical Chemistry, Vol. 55, pp.1682-1684, 1983.