?url_ver=Z39.88-2004&rft_id=doi%3A10.2478%2Fs11600-011-0036-y&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Stec%2C+Krystyna&rft.aulast=Stec&rft.aufirst=Krystyna&rft.issue=2&rft.volume=60&rft.date=February+2012&rft.issn=1895-6572&rft.atitle=Mine+tremor+focal+mechanism%3A+An+essential+element+for+recognising+the+process+of+mine+working+destruction&rft.title=Acta+Geophysica&rft.pages=449-471&rft.genre=article