'EMF Measurement Methods' (Electromagnetic Waves, 2012), 'Electromagnetic Measurements in the Near Field', 2nd ed., Chap. 3, pp. 27-49, DOI: 10.1049/SBEW042E_ch3
IET Digital Library, https://digital-library.theiet.org/;jsessionid=h3galgh13igt5.x-iet-live-01content/books/10.1049/sbew042e_ch3