Using ISI Web of Knowledge (Thomson Reuters), Dr. Bartlett, whose treatments have been used in Grey's Anatomy:
The citation mapping tool tracks an article’s cited and citing references through two generations, allowing researchers to visually discover an article’s wider relationships:
Go forward and backward in time to track citing and cited references
Color code, re-configure and organize your citation maps to discover trends in citation activity
Access via any Web of Science full record
"If we can visually spot literature not directly related to one another but perhaps indirectly related, such topics may be good candidates for combination and knowledge synthesis" (Small, 1999).