1.Pigola, Stefano; Rigoli, Marco; Setti, Alberto G. Maximum principles on Riemannian manifolds and applications. Mem. Amer. Math. Soc. 174 (2005), no. 822, x+99 pp.

2. Pigola, Stefano; Rigoli, Marco; Setti, Alberto G. A Liouville-type result for quasi-linear elliptic equations on complete Riemannian manifolds. J. Funct. Anal. 219 (2005), no. 2, 400--432.

3. Pigola, Stefano; Rigoli, Marco; Setti, Alberto G. Some applications of integral formulas in Riemannian geometry and PDE's. Milan J. Math. 71 (2003), 219--281.

4. Pigola, S.; Rigoli, M.; Setti, A. G. Volume growth, "a priori" estimates, and geometric applications. Geom. Funct. Anal. 13 (2003), no. 6, 1302--1328.

5. Pigola, Stefano; Rigoli, Marco; Setti, Alberto G. A remark on the maximum principle and stochastic completeness. Proc. Amer. Math. Soc. 131 (2003), no. 4, 1283—1288.

6. Pigola, Stefano; Rigoli, Marco; Setti, Alberto G. Maximum principles and singular elliptic inequalities. J. Funct. Anal. 193 (2002), no. 2, 224--260.

7. Pigola, Stefano; Rigoli, Marco; Setti, Alberto G. Some remarks on the prescribed mean curvature equation on complete manifolds. Pacific J. Math. 206 (2002), no. 1, 195--217.