@article{JGG_2014_18_2_JGG_2014_18_2_a7,
     author = {C. Leopold },
     title = {Perspective {Concepts} - {Exploring} {Seeing} and {Representation} of {Space}},
     journal = {Journal for geometry and graphics},
     pages = {225--238},
     publisher = {mathdoc},
     volume = {18},
     number = {2},
     year = {2014},
     url = {http://geodesic.mathdoc.fr/item/JGG_2014_18_2_JGG_2014_18_2_a7/}
}