Schwarzl, T.; Heiß, W.; Springholz, G.; Aigle, M.; Pascher, H.: '6 µm vertical cavity surface emitting laser based on IV-VI semiconductor compounds', Electronics Letters, 2000, 36, (4), p. 322-324, DOI: 10.1049/el:20000260
IET Digital Library, http://digital-library.theiet.org/;jsessionid=b44dj04375cer.x-iet-live-01content/journals/10.1049/el_20000260