@article{Kołodziejczyk:2011,
  author  = "U. Kołodziejczyk and A. Asani and M. Byszkiewicz and A. Jędrzejczyk",
  title   = "Water balance of selected post-mining reservoirs in the Łęknica Region",
  journal = "Civil and Environmental Engineering Reports",
  volume  = "No. 7",
  pages   = "69--81",
  year    = "2011",
  note    = "University of Zielona Góra Press, Zielona Góra",
}