Authors
Sergiu Lucaciu
Physics Department, West University of Timisoara, Timisoara, Romania
Robert Blaga
Physics Department, West University of Timisoara, Timisoara, Romania
Nicoleta Stefu
Physics Department, West University of Timisoara, Timisoara, Romania
Marius Paulescu
Physics Department, West University of Timisoara, Timisoara, Romania
