@misc{Kim_Sung_Soo_Discontinuity,
 author={Kim, Sung Soo and Plewik, Szymon},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Śląskiego},
 language={eng},
 title={Discontinuity and involutions on countable sets},
 type={artykuł},
 keywords={matematyka},
}