?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=+Koch+S%C3%A1ndor&rft.aulast=Koch&rft.aufirst=S%C3%A1ndor&rft.volume=5&rft.issn=0365-8066&rft.title=Acta+mineralogica-petrographica&rft.pages=15-37&rft.atitle=Processes+occurring+at+the+decomposition+of+sulphide+ores&rft.date=1951&rft.genre=article