Influence of acute mental stress on the forehead photoplethysmographic signal waveformPilt, Kristjan; Karai, Deniss; Bachmann, Maie; Gavriljuk, Marietta; Fridolin, Ivo19th Nordic-Baltic conference on biomedical engineering and medical physics : proceedings of NBC 2023, June 12-14, 2023, Liepaja, Latvia2023 / p. 181 - 188 https://doi.org/10.1007/978-3-031-37132-5_23 Conference Proceedings at Scopus Article at Scopus Influence of mental stress on the arterial stiffness parameters detected from photoplethysmographic signal waveformPilt, Kristjan; Karai, Deniss; Bachmann, Maie; Gavriljuk, Marietta; Allik, Ardo; Uudeberg, Tuuli2022 18th Biennial Baltic Electronics Conference (BEC)2022 / 4 p https://doi.org/10.1109/BEC56180.2022.9935609 Photoplethysmographic signal rising front analysis for the discrimination of subjects with increased arterial ageingPilt, Kristjan; Meigas, Kalju; Kööts, Kristina; Viigimaa, MargusProceedings of the Estonian Academy of Sciences2014 / p. 221-226 : ill