@article{GarciaSeguraLangerRozyczkaetal.1999,
  author    = {Garcia-Segura, Guillermo and Langer, Norbert and Rozyczka, M. and Franco, J. and MacLow, Mordecai-Mark},
  title     = {Hydrodynamics of ring nebulae : magnetic vs. non-magnetic hydro-models},
  year      = {1999},
  language  = {en}
}
@article{GarciaSeguraLangerRozyczkaetal.1999,
  author    = {Garcia-Segura, Guillermo and Langer, Norbert and Rozyczka, M. and Franco, J.},
  title     = {Shaping bipolar and elliptical planetary nebulae : effects of stellar rotation, photoionization heating and magnetic fields},
  year      = {1999},
  language  = {en}
}
@article{GarciaSeguraFrancoLopezetal.2000,
  author    = {Garcia-Segura, Guillermo and Franco, J. and Lopez, J. A. and Langer, Norbert and Rozyczka, M.},
  title     = {MHD Models for planetary nebulae},
  year      = {2000},
  language  = {en}
}