Alginahi, Yasser; Kabir, Muhammad Nomani: 'Conclusion' (Security, 2019), 'Authentication Technologies for Cloud Computing, IoT and Big Data', Chap. 13, pp. 339-341, DOI: 10.1049/PBSE009E_ch13
IET Digital Library, https://digital-library.theiet.org/;jsessionid=5m64tkh3da9o8.x-iet-live-01content/books/10.1049/pbse009e_ch13