@Article{ 
  CalFinZae15,
  author = { Calvaruso, Giovanni and Fino, Anna and Zaeim, Amirhesam },
  title = { Homogeneous geodesics of non-reductive homogeneous pseudo-Riemannian 4-manifolds },
  journal = { Bull. Braz. Math. Soc. (N.S.) },
  year = { 2015 },
  doi = { 10.1007/s00574-015-0083-0 },
  volume = { 46 },
  number = { 1 },
  pages = { 23-64 },
  URL = { https://gecogedi.dimai.unifi.it/paper/182/ },
  note = { cvgmt preprint}
}