Olsen, Martin Aastrup; Šmida, Vladimír; Busch, Christoph: 'Finger image quality assessment features – definitions and evaluation', IET Biometrics, 2016, 5, (2), p. 47-64, DOI: 10.1049/iet-bmt.2014.0055
IET Digital Library, https://digital-library.theiet.org/;jsessionid=8dpb33h72ghik.x-iet-live-01content/journals/10.1049/iet-bmt.2014.0055