Chen, Yang-Yi; Lin, Chun-Liang; Lin, Yu-Cheng; Zhao, Changchen: 'Non-invasive detection of alcohol concentration based on photoplethysmogram signals', IET Image Processing, 2018, 12, (2), p. 188-193, DOI: 10.1049/iet-ipr.2017.0625 IET Digital Library, https://digital-library.theiet.org/;jsessionid=ix716ib1rfnu.x-iet-live-01content/journals/10.1049/iet-ipr.2017.0625