About this article
Published Online: Aug 28, 2015
Page range: 93 - 101
DOI: https://doi.org/10.1515/sgem-2015-0026
Keywords
© by Bogumił Wrana
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Wrana, Bogumił
Pietrzak, Natalia