'Representation of Microwave Two-Port Network' (Electromagnetic Waves, 2010), 'RF and Microwave Modeling and Measurement Techniques for Field Effect Transistors', Chap. 2, pp. 7-71, DOI: 10.1049/SBEW027E_ch2
IET Digital Library, https://digital-library.theiet.org/;jsessionid=5m2a2tk9sco73.x-iet-live-01content/books/10.1049/sbew027e_ch2