@article{GoicoecheaGilMerinoSerraRicartetal.2001,
  author    = {Luis Julian Goicoechea and Rodrigo Gil-Merino and M. Serra-Ricart and E. Mediavilla and Alejandro Oscoz and D. Alcalde},
  title     = {The nature of dark matter in elliptical (cD) galaxies : main lens galaxy of Q0957+561},
  year      = {2001},
}