Hodgkinson, T.G.; Webb, R.P.: 'Application of communications theory to analyse carrier density modulation effects in travelling-wave semiconductor laser amplifiers', Electronics Letters, 1988, 24, (25), p. 1550-1552, DOI: 10.1049/el:19881058
IET Digital Library, https://digital-library.theiet.org/;jsessionid=pen5edo4g8u1.x-iet-live-01content/journals/10.1049/el_19881058