'Waveguide Transmission Coefficientτ' (Electromagnetic Waves, 1995), 'Electronic Applications of the Smith Chart', Chap. 8, pp. 91-99, DOI: 10.1049/SBEW003E_ch8
IET Digital Library, https://digital-library.theiet.org/;jsessionid=d11ib49phsdn.x-iet-live-01content/books/10.1049/sbew003e_ch8