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DOI: https://doi.org/10.2478/ers-2018-0043 | Journal eISSN: 2451-182X | Journal ISSN: 2083-3725
Language: English
Page range: 147 - 159
Submitted on: Aug 1, 2017
Accepted on: Dec 1, 2018
Published on: Mar 12, 2019
Published by: John Paul II University of Applied Sciences
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year

© 2019 Włodzimierz Wójcicki, published by John Paul II University of Applied Sciences
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.