@misc{Piasecki_Stanisław_An_2011,
 author={Piasecki, Stanisław},
 copyright={Creative Commons Attribution BY 4.0 license},
 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},
 title={An introduction to a theory of market competition * Introduction * Other special problems * Concluding remarks},
 type={Text},
 URL={http://rcin.org.pl/Content/198638/PDF/KS-2011-12-T2R05.pdf},
}