Authors
Sławomir Przybyło
slawomir.przybylo@up.krakow.pl
Institute of Mathematics, Pedagogical University of Krakow, Kraków, Poland
slawomir.przybylo@up.krakow.pl
© 2022 Sławomir Przybyło, published by Pedagogical University of Cracow
This work is licensed under the Creative Commons Attribution-ShareAlike 4.0 License.