Authors
Abdelouahab Zaatri
Independent Researcher, Ex-Dep. of Mechanical Engineering, Univ. of Brothers Mentouri, Constantine 1, Algeria
© 2020 Abdelouahab Zaatri, Ridha Kelaiaia, published by Valahia University of Targoviste
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.