Li, Charles Y.; Ratha, Nalini K.: 'Big data and cloud identity service for mobile authentication' (Security, 2017), 'Mobile Biometrics', Chap. 17, pp. 423-454, DOI: 10.1049/PBSE003E_ch17
IET Digital Library, https://digital-library.theiet.org/;jsessionid=b572hij61f84a.x-iet-live-01content/books/10.1049/pbse003e_ch17