- Andrey A. Dobrynin, Leonid S. Mel'nikov, “Some results on the Wiener index of iterated line graphs”, Electronic Notes in Discrete Mathematics, 22, 2005, 469
- M. Ghebleh, A. Kanso, D. Stevanović, “Open quipus with the same Wiener index as their quadratic line graph”, Applied Mathematics and Computation, 281, 2016, 130