@article{SIGMA_2016_12_a62,
     author = {Giovanni Calvaruso and Amirhesam Zaeim},
     title = {Symmetries of {Lorentzian} {Three-Manifolds} with {Recurrent} {Curvature}},
     journal = {Symmetry, integrability and geometry: methods and applications},
     year = {2016},
     volume = {12},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SIGMA_2016_12_a62/}
}