?url_ver=Z39.88-2004&rft_id=10.4028%2Fwww.scientific.net%2FAMM.110-116.357&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aufirst=R.&rft.au=Shahzad%2C+R.&rft.aulast=Shahzad&rft.issn=16609336&rft.atitle=Characteristics+of+lean+and+stoichiometric+combustion+of+compressed+natural+gas+in+a+direct+injection+engine&rft.title=Applied+Mechanics+and+Materials&rft.isbn=9783037852620&rft.date=2012&rft.pages=357-369&rft.volume=110-11&rft.genre=article