%0 Journal Article %T The Permian-Triassic boundary in the Idrijca Valley (Western Slovenia): isotopic fraction between carbonate and organic carbon at P/Tr transition %A Tadej Dolenec %A Sonja Lojen %A Matej Dolenec %J Geologija %D 1999 %I Geological Survey of Slovenia %K P/Tr boundary %K Idrijca Valley %K stable isotopes %K isotopic fractionation %U http://www.geologija-revija.si/dokument.aspx?id=745