À propos de cet article
Publié en ligne: 05 déc. 2019
Pages: 93 - 122
Reçu: 13 oct. 2018
Accepté: 29 avr. 2019
DOI: https://doi.org/10.2478/aupcsm-2019-0008
Mots clés
© 2019 Andrzej Nowicki, published by Sciendo
This work is licensed under a Creative Commons Attribution Share-Alike 4.0 License.
Nowicki, Andrzej
Nicolaus Copernicus University, Faculty of Mathematics and Computer ScienceToruń, Poland