From professional translators, enterprises, web pages and freely available translation repositories.
3ª edición. baden-baden: nomos,1998.
in: hanf, g.; varsori, a. (hg.) a history of vet in europe - proceedings of the florence conference 2002. luxembourg: office for official publications of the european communities, 2004. cedefop panorama series, nr. 5153, bd. 1.