Waveform analysis of peripheral pulse wave detected in the fingertip with photoplethysmographHlimonenko, Irina; Meigas, Kalju; Vahisalu, ReinProceedings of the 4th International Conference Measurement : Smolenice, Slovak Republic, 20032003 / p. 234-237 https://www.measurement.sk/2003/S2/Hlimonenko.pdf