About this article
Published Online: Sep 17, 2016
Page range: 281 - 293
DOI: https://doi.org/10.1515/eec-2016-0015
© 2016 Nicolaus Copernicus University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Hanna Podedworna
Warsaw University of Life Sciences, Poland