Second derivative analysis of forehead photoplethysmographic signal in healthy volunteers and diabetes patients [Electronic resource]Pilt, Kristjan; Meigas, Kalju; Temitski, Kristina; Viigimaa, MargusIFMBE proceedings ; Vol. 392012 / p. 410-413 : ill [CD-ROM] The analysis of finger photoplethysmographic waveform in healthy volunteers and diabetes patients [Electronic resource]Pilt, Kristjan; Meigas, Kalju; Temitski, Kristina; Viigimaa, MargusIFMBE proceedings ; Vol. 382013 / p. 55-58 : ill [CD-ROM]