has been cited by the following article(s):
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[1]
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The Impact of Trade and Transport Services on the Environment in Africa
Economic Themes,
2020
DOI:10.2478/ethemes-2020-0024
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[2]
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Impacts of Air Pollution on Productivity Growth in the Air and Truck Transportation Industries in the US: an Application of the Data Envelopment Analysis Malmquist Environmental Productivity Index
Open Journal of Social Sciences,
2015
DOI:10.4236/jss.2015.32016
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