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China & World Economy > 32 > 1 > 231 - 258
Ecological Economics > 2018 > 145 > C > 57-74
BMC Health Services Research > 2015 > 15 > 1 > 1-10
Regional Science and Urban Economics > 2010 > 40 > 4 > 241-252
Ecological Economics > 2009 > 69 > 2 > 406-413