1. Preparing for EPSS projects;Benko;Communications of the ACM,1997
2. It ROI metrics fall into four groups;Berry;Internetweek Manhasset,2001
3. ROI: The IT departmen's moving target;Coopeland;Informationweek Manhasset,2001
4. Measure what you bring to the bottom line;Davidson;Workforce,1998
5. Cost-justifying electronic performance support systems;Desmarais;Communications of the ACM,1997