RIZZOLATTI, G., and L. CRAIGHERO. “Speculazions Su La Origjin Dal Lengaç”. Gjornâl Furlan Des Siencis - Friulian Journal of Science, vol. 3, no. 5, Dec. 2004, pp. 93-101, https://www.gfs-fjs.net/index.php/gsf/article/view/62.