Collao, M., Pizarro, P. and Rojo, O. 2012. An Upper Bound on The Largest Signless Laplacian of an Odd Unicyclic Graph. Proyecciones (Antofagasta, On line). 31, 1 (Jan. 2012), 39-49. DOI:https://doi.org/10.4067/S0716-09172012000100005.