Parker, Anthony E.; Scott, Jonathan B.: 'Modelling and characterisation of GaAs devices' (Materials, Circuits and Devices, 1996), 'Low-power HF Microelectronics: a unified approach', Chap. 6, pp. 211-246, DOI: 10.1049/PBCS008E_ch6
IET Digital Library, https://digital-library.theiet.org/;jsessionid=lhrftd7c9r13.x-iet-live-01content/books/10.1049/pbcs008e_ch6