@article{JGG_2003_7_2_JGG_2003_7_2_a1,
     author = {A. D�r},
     title = {An {Algebraic} {Equation} for the {Central} {Projection}},
     journal = {Journal for geometry and graphics},
     pages = {137--144},
     publisher = {mathdoc},
     volume = {7},
     number = {2},
     year = {2003},
     url = {http://geodesic.mathdoc.fr/item/JGG_2003_7_2_JGG_2003_7_2_a1/}
}