@misc{Klukowski_Leszek_Methods_2011,
 author={Klukowski, Leszek},
 copyright={Licencja Creative Commons Uznanie autorstwa 4.0},
 address={Warszawa},
 journal={Książka = Book},
 howpublished={online},
 year={2011},
 publisher={Instytut Badań Systemowych. Polska Akademia Nauk},
 publisher={Systems Research Institute. Polish Academy of Sciences},
 language={eng},
 type={Tekst},
 title={Methods of estimation of relations of: equivalence, tolerance and preference in a finite set * Estimation of relations – the main ideas},
 URL={http://www.rcin.org.pl/Content/205891/PDF/KS-2011-06-T69R02.pdf},
}