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Bond S., 2002, PORT ECON J, V1, P141, DOI [10.1007/s10258-002-0009-9, https://doi.org/10.1007/s10258-002-0009-9, DOI 10.1007/S10258-002-0009-9, DOI 10.1007/s11356-019-06333-1]
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Bond S.R., 2001, EC PAPERS 2001 W21