@misc{Collaço_Paula_Oliveira_An,
 author={Collaço, Paula Oliveira and Sarychev, Andrey},
 howpublished={online},
 publisher={Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej},
 language={eng},
 type={artykuł},
 title={An Example of a Contractive Mapping Without Fixed Point},
 keywords={matematyka},
}