O artykule
Data publikacji: 04 mar 2019
Zakres stron: 242 - 248
Otrzymano: 06 lip 2017
DOI: https://doi.org/10.2478/ausm-2018-0019
Słowa kluczowe
© 2018 C. Carpintero et al., published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
The aim of this paper is to introduce and study upper and lower