Perturbation of Sets and Centers. - Elisabetta Alvoni; Pier Luigi Papini (J. Glob. Optim., 2005)

Different Types of Convexity and Concavity for Copulas. - Elisabetta Alvoni; Fabrizio Durante; Pier Luigi Papini; Carlo Sempi (EUSFLAT Conf. (1), 2007)

A weakening of Schur-concavity for copulas. - Fabrizio Durante; Pier Luigi Papini (Fuzzy Sets Syst., 2007)

2-Increasing binary aggregation operators. - Fabrizio Durante; Radko Mesiar; Pier Luigi Papini; Carlo Sempi (Inf. Sci., 2007)

On a class of transformations of copulas and quasi-copulas. - Elisabetta Alvoni; Pier Luigi Papini; Fabio Spizzichino (Fuzzy Sets Syst., 2009)

Componentwise Concave Copulas and Their Asymmetry. - Fabrizio Durante; Pier Luigi Papini (Kybernetika, 2009)