@article{article98320532,
title   = {Lyapunov graphs for circle valued functions},
author = {Rezende, Ketty A. de and Ledesma, Guido G. E and Manzoli Neto, Oziride and Vago, Gioia Maria},
year = {2018},
doi = {10.1016/j.topol.2018.06.008},
journal   = {Topology and its Applications}
}