1. Sulla struttura topologica delle varietà compatte;Atti Sem. Mat. Fis. Univ. Modena,1974
2. On the genus of smooth 4-manifolds;Trans. Amer. Math. Soc.,1999
3. On simply-connected 4-manifolds;J. Lond. Math. Soc. (2),1964
4. On the genus of ℝℙ3×𝕊1{\mathbb{R}\mathbb{P}^{3}\times\mathbb{S}^{1}};Collect. Math.,1999