Rathgeb, Christian; Wagner, Johannes; Busch, Christoph: 'Iris biometric template protection' (Security, 2017), 'Iris and Periocular Biometric Recognition', Chap. 14, pp. 317-340, DOI: 10.1049/PBSE005E_ch14
IET Digital Library, https://digital-library.theiet.org/;jsessionid=461bah8gq0k4c.x-iet-live-01content/books/10.1049/pbse005e_ch14