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Economics and Environment > 2023 > No. 2 > 296--307
Environment Protection Engineering > 2015 > Vol. 41, nr 2 > 107--117
Environment Protection Engineering > 2013 > Vol. 39, nr 2 > 105--113
Economics and Environment > 2023 > No. 2 > 296--307
Environment Protection Engineering > 2015 > Vol. 41, nr 2 > 107--117
Environment Protection Engineering > 2013 > Vol. 39, nr 2 > 105--113