@article{SIGMA_2015_11_a79,
     author = {Decio Levi and Luigi Martina and Pavel Winternitz},
     title = {Structure {Preserving} {Discretizations} of the {Liouville} {Equation} and their {Numerical} {Tests}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2015},
     volume = {11},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2015_11_a79/}
}