{{sfn | Lueg | Fisher | 2003 | p=}}

* {{cite book | last=Lueg | first=Christopher | last2=Fisher | first2=Danyel | title=From Usenet to CoWebs | publisher=Springer Science & Business Media | publication-place=London Berlin Heidelberg | date=2003 | isbn=978-1-85233-532-8}}

<ref name="z621">{{cite book | last=Lueg | first=Christopher | last2=Fisher | first2=Danyel | title=From Usenet to CoWebs | publisher=Springer Science & Business Media | publication-place=London Berlin Heidelberg | date=2003 | isbn=978-1-85233-532-8 | page=}}</ref>