@misc{Jahnke_Dietmar_Modelling_1994,
 author={Jahnke, Dietmar},
 copyright={Creative Commons Attribution BY 4.0 license},
 journal={Książka = Book},
 address={Warszawa},
 howpublished={online},
 year={1994},
 publisher={Instytut Badań Systemowych. Polska Akademia Nauk},
 publisher={Systems Research Institute. Polish Academy of Sciences},
 language={eng},
 type={Text},
 title={Modelling of economy in specially protected regions : proceedings of international conference held on 9-11 june in drawn * The ecological farming as an alternative to the farm economical situation in agricultur enterprises at this time},
 URL={http://rcin.org.pl/Content/217605/PDF/KS-1994-01-P09.pdf},
}