?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=F&rft.au=Vallianatos%2C+F&rft.aulast=Vallianatos&rft.atitle=Natural+time+analysis+of+critical+phenomena%3A+The+case+of+acoustic+emissions+in+triaxially+deformed+Etna+basalt&rft.issue=20&rft.date=15+October+2013&rft.pages=5172-5178&rft.title=Physica+A%3A+Statistical+Mechanics+and+its+Applications&rft.issn=1873-2119&rft.volume=392&rft.genre=article