?url_ver=Z39.88-2004&rft_id=10.4028%2Fwww.scientific.net%2FKEM.701.67&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Ameen%2C+M.&rft.aulast=Ameen&rft.aufirst=M.&rft.pages=67-72&rft.atitle=Effects+of+ultrasound+irradiation+on+synthesis+of+solid+acid+catalysts&rft.isbn=9783038356875&rft.volume=701&rft.issn=10139826&rft.date=2016&rft.title=Key+Engineering+Materials&rft.genre=article