DOI: https://doi.org/10.2478/ep-2020-0001 | Journal eISSN: 2380-0550 (formerly 1898-5238) | Journal ISSN: 1898-5238
Language: English
Page range: 7 - 8
Published on: Jul 24, 2020
Published by: Andrzej Frycz Modrzewski Krakow University
In partnership with: Paradigm Publishing Services
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© 2020 Jan Widacki, published by Andrzej Frycz Modrzewski Krakow University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.