@misc{Cohen2009,
author = {Cohen, Nathann and Dimitrov, Darko and Krakovski, Roi and Škrekovski, Riste and Vukašinović, Vida},
year = {2009},
title = {On Wiener index of graphs and their line graphs},
howpublished = "http://dx.doi.org/10.17169/refubium-22989",
}