Solution to the Social Portfolio Problem by Evolutionary Algorithms. - Claudia Gómez-Santillán; Gilberto Rivera Zárate; Laura Cruz-Reyes; Rogelio García Rodriguez; Fausto Balderas; Eduardo Fernández-González 002; Fernando López Irarragorri (Int. J. Comb. Optim. Probl. Informatics, 2012)