@Article{zimmer2011a,
  author =          {Zimmer, F.},
  author =          {Schmidt, R. W.},
  author =          {Wambsganss, J.},
  title =           {X-ray microlensing in the quadruply lensed quasar Q2237+0305},
  journal =         {MON NOT R ASTRON SOC},
  year =            {2011},
  volume =          {413},
  pages =           {1099-1106},
  month =           {May},
  note =            {Provided by the SAO/NASA Astrophysics Data System}}