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Constantin Udrişte
University Politehnica of Bucharest, Faculty of Applied Sciences, Department of Mathematics and Informatics, Splaiul Independentei 313, RO-060042, Bucharest, Romania
Mădălina Constantinescu
University Politehnica of Bucharest, Faculty of Applied Sciences, Department of Mathematics and Informatics, Splaiul Independentei 313, RO-060042, Bucharest, Romania
Ionel Ţevy
University Politehnica of Bucharest, Faculty of Applied Sciences, Department of Mathematics and Informatics, Splaiul Independentei 313, RO-060042, Bucharest, Romania
Oltin Dogaru
University Politehnica of Bucharest, Faculty of Applied Sciences, Department of Mathematics and Informatics, Splaiul Independentei 313, RO-060042, Bucharest, Romania