@article{skoczko_szatyłowicz_malinowski_2017, 
  title={Economic Analysis of Selected Filter Beds Used for Water Treatment}, 
  volume={17}, 
  DOI={10.25167/ees.2017.44.32}, 
  number={44}, 
  publisher={Uniwersytet Opolski}, 
  author={SKOCZKO and SZATYŁOWICZ and MALINOWSKI}, 
  year={2017}, 
  month={Dec}
  }