@article{10_4064_fm89_6_2016,
     author = {Jorge Iglesias and Aldo Portela and \'Alvaro Rovella and Juliana Xavier},
     title = {Dynamics of annulus maps {II:} {Periodic} points for coverings},
     journal = {Fundamenta Mathematicae},
     pages = {257--276},
     publisher = {mathdoc},
     volume = {235},
     number = {3},
     year = {2016},
     doi = {10.4064/fm89-6-2016},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/fm89-6-2016/}
}