About this article
Published Online: Apr 06, 2017
Page range: 28 - 34
Received: Oct 12, 2016
Accepted: Dec 15, 2016
DOI: https://doi.org/10.1515/pielxxiw-2016-0034
Keywords
© 2017
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Dyk, Danuta
Poland
Ozga, Dorota
Poland
Gutysz-Wojnicka, Aleksandra
Poland
Lewandowski, Bogumił
Poland
Wojtaszek, Marek
Poland