?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Kijko%2C+Andrzej&rft.aulast=Kijko&rft.aufirst=Andrzej&rft.issue=4&rft.volume=XXX&rft.date=1982&rft.issn=1895-6572&rft.atitle=A+modified+form+of+the+first+Gumbel+distribution%3A+model+for+the+occurrence+of+large+earthquakes.+Part.+I.+Derivation+of+distribution&rft.title=Acta+Geophysica+Polonica&rft.genre=article