@article{Krupińska:2015,
  author  = "I. Krupińska",
  title   = "Importance of humic substances for methods of groundwater treatment",
  journal = "Polish Journal of Soil Science",
  volume  = "Vol. 48",
  number  = "no. 2",
  pages   = "161--172",
  year    = "2015",
}