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Conservation Biology > 28 > 2 > 404 - 413
Ecological Economics > 2012 > 75 > Complete > 43-51
Research in Transportation Business & Management > 2011 > 2 > Complete > 83-91
Marine Policy > 2009 > 33 > 2 > 201-206
Environmental and Resource Economics > 2007 > 37 > 1 > 91-109
Transportation Research Part D > 2004 > 9 > 1 > 1-27