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Publicado en línea: 21 sept 2023
Páginas: 121 - 129
DOI: https://doi.org/10.2478/awutm-2023-0010
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© 2023 Loredana Camelia Culda, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Culda, Loredana Camelia
West University of Timisoara, Department of MathematicsTimisoara, Romania