{{sfn | Olah | Goeppert | Prakash | 2006 | p=}}

* {{cite book | last=Olah | first=George A. | last2=Goeppert | first2=Alain | last3=Prakash | first3=G. K. Surya | title=Beyond Oil and Gas | publisher=Wiley-VCH | publication-place=Weinheim [an der Bergstrasse, Germany] | date=2006-03-23 | isbn=978-3-527-31275-7}}

<ref name="j091">{{cite book | last=Olah | first=George A. | last2=Goeppert | first2=Alain | last3=Prakash | first3=G. K. Surya | title=Beyond Oil and Gas | publisher=Wiley-VCH | publication-place=Weinheim [an der Bergstrasse, Germany] | date=2006-03-23 | isbn=978-3-527-31275-7 | page=}}</ref>