About this article
Published Online: Mar 27, 2020
Page range: 123 - 140
Received: Aug 20, 2018
Accepted: Nov 05, 2018
DOI: https://doi.org/10.2478/udt-2019-0008
Keywords
© 2019 Charles Helou, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Helou, Charles
Pennsylvania State University