@article{WisotzkiSchechterChenetal.2004,
  author    = {Lutz Wisotzki and P. L. Schechter and H. W. Chen and D. Richstone and Knud Jahnke and Sebastian F. Sanchez and Dieter Reimers},
  title     = {HE 0047-1756 : a new gravitationally lensed double QSO},
  year      = {2004},
}