Authors
Ahmed Mohammed Teen
Ovidius University of Constanta Doctoral School of Applied Sciences, Constanta, Romania
Ana Maria Gramescu
Ovidius University of Constanta, Constanta, Romania
© 2019 Ahmed Mohammed Teen, Ana Maria Gramescu, published by Ovidius University of Constanta
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.