Furnell, Steven: 'Information security foundation, theories and future vision' (Security, 2018), 'Information Security: Foundations, Technologies and Applications', Chap. 2, pp. 13-39, DOI: 10.1049/PBSE001E_ch2
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1mwvvi8wfgs83.x-iet-live-01content/books/10.1049/pbse001e_ch2