Loizou, Christos P.: 'Summary' (Healthcare Technologies, 2018), 'Handbook of Speckle Filtering and Tracking in Cardiovascular Ultrasound Imaging and Video', Chap. 4, pp. 77-77, DOI: 10.1049/PBHE013E_ch4
IET Digital Library, https://digital-library.theiet.org/;jsessionid=2fie820i8u7.x-iet-live-01content/books/10.1049/pbhe013e_ch4