Alcock, I.P.; Ferguson, A.I.; Hanna, D.C.; Tropper, A.C.: 'Mode-locking of a neodymium-doped monomode fibre laser', Electronics Letters, 1986, 22, (5), p. 268-269, DOI: 10.1049/el:19860184
IET Digital Library, https://digital-library.theiet.org/;jsessionid=1quoascffvupj.x-iet-live-01content/journals/10.1049/el_19860184