About this article
Published Online: Jul 12, 2019
Page range: 68 - 75
DOI: https://doi.org/10.2478/pomr-2019-0026
Keywords
© 2019 Zhiquan Liu, published by Sciendo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.
Liu, Zhiquan
Shanghai Maritime UniversityChina