@misc{Kawa_Renata_A,
 author={Kawa, Renata and Kula, Mieczysław},
 howpublished={online},
 publisher={Wydaw. Uniwersytetu Marii Curie-Skłodowskiej},
 language={eng},
 type={czasopismo},
 title={A Remark on Hierarchical Threshold Secret Sharing},
}