Ward, Keith; Tough, Robert; Watts, Simon: 'Sea Clutter: Scattering, the K Distribution and Radar Performance' (Radar, Sonar and Navigation, 2013) DOI: 
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1st63ywnyob02.x-iet-live-01content/books/ra/pbra025e