Olgun, U.; Chen, C.-C.; Volakis, J.L.: 'Design of an efficient ambient WiFi energy harvesting system', IET Microwaves, Antennas & Propagation, 2012, 6, (11), p. 1200-1206, DOI: 10.1049/iet-map.2012.0129
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1pp36pif2lnhq.x-iet-live-01content/journals/10.1049/iet-map.2012.0129