Finding the True Border Between Yankee and Red Sox Nation Using Facebook Data
The Jeter-Papi line
Up Close on Baseball's Borders - The New York Times
Is White Sox' season falling apart already? - Chicago Sun-Times
Map of Red Sox and Yankees territory in Connecticut : r/baseball
Everything You Need to Know About the Return of Baseball
Yankees–Red Sox rivalry - Wikipedia
The Yankees-Red Sox Rivalry's Dividing Line - WSJ
Map of Red Sox and Yankees territory in Connecticut : r/baseball