Existence of additive utility on positive semigroups: An elementary proof. - Juan Carlos Candeal; Esteban Induráin; Esteban Olóriz (Ann. Oper. Res., 1998)

Numerical Representations of Interval Orders. - Gianni Bosi; Juan Carlos Candeal; Esteban Induráin; Esteban Olóriz; Margarita Zudaire (Order, 2001)