About this article
Published Online: Dec 22, 2018
Page range: 251 - 260
DOI: https://doi.org/10.2478/mgrsd-1996-070135
Keywords
© 2018 Jan Goleń, Wiesław Ostrowski, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Goleń, Jan
Ostrowski, Wiesław