{{sfn|Chalmers|Griffiths|2002|p=}}

* {{cite book | last=Chalmers | first=John M. | last2=Griffiths | first2=Peter R. | title=Handbook of Vibrational Spectroscopy | publisher=J. Wiley | publication-place=New York | date=2002 | isbn=978-0-471-98847-2}}

<ref name="x982">{{cite book | last=Chalmers | first=John M. | last2=Griffiths | first2=Peter R. | title=Handbook of Vibrational Spectroscopy | publisher=J. Wiley | publication-place=New York | date=2002 | isbn=978-0-471-98847-2 | page=}}</ref>