Benetazzo, Flavia; Freddi, Alessandro; Monteriù, Andrea; Longhi, Sauro: 'Respiratory rate detection algorithm based on RGB-D camera: theoretical background and experimental results', Healthcare Technology Letters, 2014, 1, (3), p. 81-86, DOI: 10.1049/htl.2014.0063
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1qkp0oa2ay7u0.x-iet-live-01content/journals/10.1049/htl.2014.0063