Parmi ses publications importantes en matière de droit des étrangers, on relève notamment: 

• Diritto degli stanieri (droit des étrangers), avec la contribution de Paolo Bonetti, Cedam edts, 2003.
• Cittadinanza dell'Unione e libera circolzione delle persone (citoyenneté de l'Union et libre circulation des personnes), en collaboration avec M. Condinanzi, A. Lang, Giuffrè Editore, 2003.
• A condição jurídica dos emigrados exteacomunitários: novas perspectivas para a cidadania européia, in Cidadania e Nacionalidade, efeitos e perspectivas nacionais - regionais - globais, (organizadores A. Dal Ri, O.M. de Oliveira), Ijuí, 2002, pp. 343-348.
• Italy - Comparative Legal Study on Subsidiary Protection, report in collaboration with C. Giulini, in Subsidiary protection of refugees in the European Union: complementing the Geneva Convention? (under supervision of D. Bouteillet-Paquet), Brussels, 2002, pp. 569-619.
• Expulsion and Detention of Aliens in the European Union Countries, B. Nascimbene editor, Milan, 2001; ivi, in collaboration with A. Di Pascale, Rapport de synthèse et conclusions, pp. 533-602.
• La régularisation des étrangers illégaux en Italie, report in collaboration with A. Di Pascale, in Regularisations of Illegal Immigrants in the European Union (under supervision of P. De Bruycker), Brussels, 2000, pp. 273.
• Immigration legislation reform in Italy. The international and European Community frameworks, in Revue des Affaires Européennes/Law & European Affairs, 2000, pp. 94-106.
• Finding a Solution through Citizenship, in European Journal of Migration and Law, 1999, pp. 329-346.
• Citizenship of the Union. National Competence and Community Competence, in Thirty years of free movement of workers in Europe, J.Y. Carlier, M. Verwilghen editors, Brussels, 1998, pp. 273-279.
• Towards a European Law on Citizenship and Nationality?, in Citizenship and Nationality Status in the New Europe, S. O'Leary, T. Tiilikainen editors, London, 1998, pp. 63-79.
• Internationale Rechtshilfe in Strafsachen im deutsch-italienischen Verkehr nach dem Übereinkommen von Schengen und dem Vertrag von Amsterdam, in Jahrbuch für Italienisches Recht, Band 11, 1998, pp. 119-152.
• The Process of European Citizenship, in Citizenship and Immigration, V. Ferrari, T. Heller and E. De Tullio editors, Milano, 1998, pp. 53-62.
• Italy, report in collaboration with C. Peña Galiano, in Who is a Refugee? A comparative Case Law Study, J.-Y.Carlier, D. Vanheule, K. Hullmann, C. Peña Galiano editors, The Hague-London-Boston, 1997, pp. 457-469: the report is also published in Qu'est-ce-que qu'un réfugié?, Bruxelles, 1998, pp. 487-500.
• Droit international de l’asile et des réfugiés: pratique italienne, Société Française pour le Droit International, Droit d’asile et des réfugiés, Colloque de Caen, Paris, 1997, p. 349.
• ("La politique en matière d'immigration et d'asile", L'Italie sans l'Europe?), rédigé par G. Bonvicini, P. Cecchini, P.C. Padoan, N. Ronzitti, Milano, 1997, p. 135; 
• Italy’s Participation in EU Immigration and Asylum Policy ("La participation de l'Italie dans les politiques d'immigration et d'asile de l'Union européenne"), co-auteur avec A. Lang, The International Spectator , 1997, p. 45.
• Nationality Laws in the European Union. Le droit de la nationalité dans l'Union européenne, B. Nascimbene editor, Milano,1996; ivi, "Nationality Laws and Citizenship of the European Union. Towards a European Law on Nationality?", pp. 1-60.