Tao, J.; Chang, W.; Shi, Y.: 'Direction-finding of coherent sources via ‘particle-velocity-field smoothing’', IET Radar, Sonar & Navigation, 2008, 2, (2), p. 127-134, DOI: 10.1049/iet-rsn:20050140
IET Digital Library, https://digital-library.theiet.org/;jsessionid=39mqdldqq5h1t.x-iet-live-01content/journals/10.1049/iet-rsn_20050140