@article{SchmidtKundicPenetal.2002,
  author    = {Robert W. Schmidt and T. Kundic and U.-L. Pen and Joachim Wambsganß and L. E. Bergeron and W. Colley and C. Corson and N. G. Hastings and T. Hoyes and D. C. Long and K. A. Loomis and S. Malhotra and J. E. Rhoads and K. Z. Stanek},
  title     = {Optical monitoring of the gravitationally lensed quasar Q2237+0305 from APO between June 1995 and January 1998},
  year      = {2002},
}