Travertine, a building stone extensively employed in Umbria from Etruscan to renaissance age: provenance determination using artificial intelligence technique
M. Petrelli et al., Travertine, a building stone extensively employed in Umbria from Etruscan to renaissance age: provenance determination using artificial intelligence technique, Periodico di mineralogia (Testo stampato) , 73(3), 2004, pp. 151-169