@ARTICLE{Mirek_Zbigniew_Theory_2017,
 author={Mirek, Zbigniew and Witkowski, Zbigniew},
 number={No 24},
 journal={Papers on Global Change IGBP},
 howpublished={online},
 year={2017},
 publisher={Polish Academy of Sciences},
 title={Theory and Practice in Nature Conservation ‒ Where to seek Sustainability?},
 URL={http://journals.pan.pl/Content/102599/PDF/8%20Mirek,%20Witkowski.pdf},
 doi={10.1515/igbp-2017-0006},
}