Vacca, M.; Graziano, M.; Ottavi, M: 'Racetrack logic', Electronics Letters, 2017, 53, (22), p. 1462-1464, DOI: 10.1049/el.2017.2961
IET Digital Library, https://digital-library.theiet.org/;jsessionid=da6eeb8o8cob.x-iet-live-01content/journals/10.1049/el.2017.2961