Collins, J.H.; Neilson, G.G.: 'Microwave pulse compression utilising an yttrium-iron-garnet delay line', Electronics Letters, 1965, 1, (8), p. 234-234, DOI: 10.1049/el:19650213
IET Digital Library, https://digital-library.theiet.org/;jsessionid=4orsfmth4c5eu.x-iet-live-01content/journals/10.1049/el_19650213