Samangouei, Pouya; Hand, Emily; Patel, Vishal M.; Chellappa, Rama: 'Active authentication using facial attributes' (Security, 2017), 'Mobile Biometrics', Chap. 5, pp. 131-153, DOI: 10.1049/PBSE003E_ch5
IET Digital Library, https://digital-library.theiet.org/;jsessionid=ej088go0n94mk.x-iet-live-01content/books/10.1049/pbse003e_ch5