Worthington, Everett L. and Van Oyen Witvliet, Charlotte and Pietrini, Pietro and Miller, Andrea J.  Forgiveness, health, and well-being: a review of evidence for emotional versus decisional forgiveness, dispositional forgivingness, and reduced unforgiveness.  Journal of behavioral medicine, 30 (4).  pp. 291-302.  ISSN 0160-7715      (2007)