About this article
Published Online: Nov 18, 2017
Page range: 13 - 28
Received: Dec 10, 2015
DOI: https://doi.org/10.1515/tmmp-2017-0002
Keywords
© 2017 Stanisław Kowalczyk et al., published by De Gruyter Open
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Kowalczyk, Stanisław
Institute of Mathematics, Pomeranian University in SłupskSłupsk, Poland
Turowska, Małgorzata
Institute of Mathematics, Pomeranian University in SłupskSłupsk, Poland