*Vertices 4
1 "IntJUrbanRegional" 0.0 0.0 0.0 x_fact 5.778382 y_fact 17.675051
2 "RegStud" 0.0 0.0 0.0 x_fact 9.857240 y_fact 30.931339
3 "TijdschrEconSocGe" 0.0 0.0 0.0 x_fact 8.973487 y_fact 12.984364
4 "UrbanStud" 0.0 0.0 0.0 x_fact 11.420802 y_fact 38.409245
*Matrix 
0.000000 0.298070 0.549174 0.565878 
0.298070 0.000000 0.568805 0.421594 
0.549174 0.568805 0.000000 0.786150 
0.565878 0.421594 0.786150 0.000000