@article{article931aa1a3,
title   = {On the concepts of complex networks to quantify the difficulty in finding the way out of labyrinths},
author = {Amancio, Diego Raphael and Oliveira Junior, Osvaldo Novais de and Costa, Luciano da Fontoura},
year = {2011},
doi = {10.1016/j.physa.2011.06.079},
journal   = {Physica A}
}