Authors
Gheorghe-Orlando Vălu
West University of Timisoara, Faculty of Physics, Timisoara, Romania
Daniela Susan-Resiga
West University of Timisoara, Faculty of Physics, Timisoara, Romania
Romanian Academy–Timisoara Branch, Timisoara, Romania
© 2021 Gheorghe-Orlando Vălu, Daniela Susan-Resiga, published by West University of Timisoara
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.