Loizou, Christos P.; Pattichis, Constantinos S.: 'An overview of despeckle-filtering techniques' (Healthcare Technologies, 2018), 'Handbook of Speckle Filtering and Tracking in Cardiovascular Ultrasound Imaging and Video', Chap. 6, pp. 95-109, DOI: 10.1049/PBHE013E_ch6
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1p0dg71e07jtb.x-iet-live-01content/books/10.1049/pbhe013e_ch6