About this article
Published Online: Dec 22, 2018
Page range: 303 - 312
DOI: https://doi.org/10.2478/mgrsd-1988-030138
Keywords
© 2018 Mirosława Czerny, Jerzy Makowski, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Czerny, Mirosława
Makowski, Jerzy