?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=M.&rft.au=Hermana%2C+M.&rft.aulast=Hermana&rft.date=2012&rft.pages=953-959&rft.volume=41&rft.issue=8&rft.issn=01266039&rft.atitle=A+new+algorithm+to+estimate+attenuation+using+frequency+shift+methods&rft.title=Sains+Malaysiana&rft.genre=article