About this article
Published Online: Sep 01, 2018
Page range: 791 - 793
DOI: https://doi.org/10.2478/jos-2018-0038
Keywords
© 2018 Hanyu Sun, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.
Sun, Hanyu
Rockville