Lopata, R. G.: 'Techniques for speckle tracking: block matching' (Healthcare Technologies, 2018), 'Handbook of Speckle Filtering and Tracking in Cardiovascular Ultrasound Imaging and Video', Chap. 14, pp. 289-320, DOI: 10.1049/PBHE013E_ch14
IET Digital Library, https://digital-library.theiet.org/;jsessionid=pee41w8sd3ea.x-iet-live-01content/books/10.1049/pbhe013e_ch14