@article{JGG_2015_19_1_JGG_2015_19_1_a8,
     author = {J. V. Correia and M. Couceiro da Costa and A. Santos Guerreiro and L. Rom�o },
     title = {Eyesight {Cartographies} -- {Unfolding} the {Visual} {Sphere}},
     journal = {Journal for geometry and graphics},
     pages = {119--132},
     publisher = {mathdoc},
     volume = {19},
     number = {1},
     year = {2015},
     url = {http://geodesic.mathdoc.fr/item/JGG_2015_19_1_JGG_2015_19_1_a8/}
}