Estrada, E., Vargas-Estrada, E., Distance-sum Heterogeneity in Graphs and Complex Networks. Applied Mathematics and Computation, 218 2012, 10393-10405.

Estrada, E., Vargas-Estrada, E., Distance-sum Heterogeneity in Graphs and Complex Networks. Applied Mathematics and Computation, 218 2012, 10393-10405. [PDF]