@article{10_4153_CMB_2014_053_7,
     author = {Martinez-Maure, Yves},
     title = {Plane {Lorentzian} and {Fuchsian} {Hedgehogs}},
     journal = {Canadian mathematical bulletin},
     pages = {561--574},
     year = {2015},
     volume = {58},
     number = {3},
     doi = {10.4153/CMB-2014-053-7},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-2014-053-7/}
}