“The Analysis of Ways of Struggle Against Artefacts at Registration Pulse Waves a Method Photoplethysmography”. Visnyk NTUU KPI Seriia - Radiotekhnika Radioaparatobuduvannia, no. 34 (June 6, 2007): 133–136. Accessed April 3, 2025. https://radap.kpi.ua/radiotechnique/article/view/391.