^1,2Bucurica, I.A.,^1,3Radulescu, C.,⁴Poinescu, A.A.,^1,3,5Popescu, I.V.,¹Nicolescu, C.M.,¹Teodorescu, S.,³Bumbac, M.,⁶Pehoiu, G.,⁶Murarescu, O.
Romanian Journal of Physics 64, 906 Link to Article [http://www.nipne.ro/rjp/2019_64_7-8.html]
¹Valahia University of Targoviste, Institute of Multidisciplinary Research for Science and Technology, Targoviste, 130004, Romania
²University of Bucharest, Faculty of Physics, Doctoral School of Physics, Bucharest, 050107, Romania
³Valahia University of Targoviste, Faculty of Sciences and Arts, Targoviste, 130004, Romania
⁴Valahia University of Targoviste, Faculty of Materials Engineering and Mechanics, Targoviste, 130004, Romania
⁵Academy of Romanian Scientists, Bucharest, 050094, Romania
⁶Valahia University of Targoviste, Faculty of Humanities, Targoviste, 130105, Romania

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