?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=PAEP&rft.au=von+Strandmann%2C+PAEP&rft.aulast=von+Strandmann&rft.atitle=Selenium+isotope+evidence+for+progressive+oxidation+of+the+Neoproterozoic+biosphere&rft.volume=6&rft.title=Nature+Communications&rft.date=18+December+2015&rft.issn=2041-1723&rft.issue=10157&rft.genre=article