@article{WucknitzWisotzkiLopezetal.2003,
  author    = {Olaf Wucknitz and Lutz Wisotzki and S. Lopez and M. D. Gregg},
  title     = {Disentangling microlensing and differential extinction in the double QSO HE 0512-3329},
  year      = {2003},
}