Yongfu SUN,
Ziyou GAO.
Special issue: Management of road and railway traffic and transportation engineering. Front. Eng, 2017, 4(4): 385‒387 https://doi.org/10.15302/J-FEM-2017110
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2017 The Author(s) 2017. Published by Higher Education Press. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0)
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