About this article
Published Online: Jun 18, 2019
Page range: 74 - 86
Received: Dec 10, 2018
Accepted: Apr 18, 2019
DOI: https://doi.org/10.2478/cait-2019-0016
Keywords
© 2019 Galina Ilieva, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Ilieva, Galina
Paisii Hilendarski, University of PlovdivPlovdiv, Bulgaria