?url_ver=Z39.88-2004&rft_id=10.1002%2Fapj.550&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.au=Saleh%2C+A.F.&rft.aulast=Saleh&rft.aufirst=A.F.&rft.title=Asia-Pacific+Journal+of+Chemical+Engineering&rft.date=2012&rft.volume=7&rft.issn=19322135&rft.issue=3&rft.atitle=Optimization+of+biomethane+production+by+anaerobic+digestion+of+palm+oil+mill+effluent+using+response+surface+methodology&rft.pages=353-360&rft.genre=article