Noninvasive measurement of blood glucose concentrations by analysing Fourier transform infra-red absorbance spectra through oral mucosa. - Kajiwara,K.; Uemura,T.; Kishikawa,H.; Nishida,K.; Hashigushi,Y.; Uehara,M.; Sakakida,M.; Ichibose,M.; Shichiri,M. (Med Biol Eng Comp, 1993)