@article{TMF_2018_196_3_a4,
     author = {D. Levi and L. Martina and P. Winternitz},
     title = {Conformally invariant elliptic {Liouville} equation and its symmetry-preserving discretization},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {419--433},
     year = {2018},
     volume = {196},
     number = {3},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_2018_196_3_a4/}
}