?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Asmelash%2C+G.M.&rft.aulast=Asmelash&rft.aufirst=G.M.&rft.title=Ceramics+-+Silikaty&rft.date=2012&rft.issue=4&rft.volume=56&rft.issn=08625468&rft.atitle=Toughening+mechanisms+of+Al2O3-SiO+2-ZrO2+composite+materials&rft.pages=360-366&rft.genre=article