'Multiplier arithmetic units' (Materials, Circuits and Devices, 2018), 'System Design with Memristor Technologies', Chap. 4, pp. 73-77, DOI: 10.1049/PBCS038E_ch4
IET Digital Library, https://digital-library.theiet.org/;jsessionid=7x596ul597bo.x-iet-live-01content/books/10.1049/pbcs038e_ch4