Brookbanks, D.M.: 'Effect of thermal impedance on chirp characteristics of high-efficiency pulsed InP oscillators', Electronics Letters, 1977, 13, (23), p. 697-698, DOI: 10.1049/el:19770493 IET Digital Library, https://digital-library.theiet.org/;jsessionid=58ihj265udhdr.x-iet-live-01content/journals/10.1049/el_19770493