1. Aoun, J.: 1982, ?Le transport des traits et la convention ?deplacer alpha??, Linguisticae Investigationes.
2. Belletti, A.: 1982, ??Morphological? passive and pro-drop: the impersonal construction in Italian?, Journal of Linguistic Research 2, 1?34.
3. Bello, A.: 1977, Gramática de la lengua castellana, Editorial Sopena Argentina, Buenos Aires.
4. Burzio, L.: 1981, Intransitive Verbs and Italian Auxiliaries, Ph.D. dissertation, MIT, published by Reidel as Italian Syntax, 1986.
5. Chomsky, N.: 1981, Lectures on Government and Binding, Foris Publications, Dordrecht.