'Computation Aids' (Radar, Sonar and Navigation, 2012), 'Radar Essentials: A concise handbook for radar design and performance analysis', Chap. 6, pp. 113-117, DOI: 10.1049/SBRA029E_ch6
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1rufvmg77lm2t.x-iet-live-01content/books/10.1049/sbra029e_ch6