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DOI: https://doi.org/10.2478/jos-2019-0012 | Journal eISSN: 2001-7367
Language: English
Page range: 279 - 283
Submitted on: Nov 1, 2017
Accepted on: Jul 1, 2018
Published online: Mar 26, 2019
Published in print: Mar 1, 2019
Published by: Sciendo
In partnership with: Paradigm Publishing Services
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© 2019 Li-Chun Zhang, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.