Faundez-Zanuy, Marcos; Mekyska, Jiri: 'Privacy of online handwriting biometrics related to biomedical analysis' (Security, 2017), 'User-Centric Privacy and Security in Biometrics', Chap. 2, pp. 17-39, DOI: 10.1049/PBSE004E_ch2
IET Digital Library, https://digital-library.theiet.org/;jsessionid=dpl1p50re3oh.x-iet-live-01content/books/10.1049/pbse004e_ch2