About this article
Published Online: Feb 02, 2022
Page range: 289 - 299
Received: Nov 21, 2018
Accepted: Mar 10, 2019
DOI: https://doi.org/10.2478/sjecr-2019-0007
Keywords
© 2021 Ljiljana Simonović Grujic, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.
Grujic, Ljiljana Simonović
Secondary School „Bora Stankovic“ VranjeSerbia