Pietrini, Pietro and Ricciardi, Emiliano and Gentili, Claudio and Vanello, Nicola and Sani, Lorenzo and Guazzelli, Mario  How the brain responds to hurtful events: neural activity elicited by aggressive versus forgiving behavior in humans.  In: 12th World Congress of Psychophysiology. The Olympics of the Brain, 18-23 September 2004, Thessaloniki, Greece  ISSN 0167-8760.       (2004)