@misc{Szyja_Paulina_Eco-efficiency_2015,
 author={Szyja, Paulina},
 address={Wrocław},
 howpublished={online},
 year={2015},
 publisher={Wyższa Szkoła Bankowa we Wrocławiu},
 type={czasopismo},
 title={Eco-efficiency in creating the ecological safety},
 keywords={environment, efficiency, eco-efficiency, ecological safety, mankind},
}