Griffiths, Hugh: 'Introduction to waveform diversity and cognitive radar' (Radar, Sonar and Navigation, 2017), 'Novel Radar Techniques and Applications Volume 2: Waveform Diversity and Cognitive Radar, and Target Tracking and Data Fusion', Chap. ptI, pp. 1-21, DOI: 10.1049/SBRA512G_ptI IET Digital Library, https://digital-library.theiet.org/;jsessionid=d1j14dnecbf8.x-iet-live-01content/books/10.1049/sbra512g_pti