Shortened footnote and citation:
{{sfn | Yanko-Hombach | Gilbert | Panin | Dolukhanov | 2006 | p=}}
* {{cite book | last=Yanko-Hombach | first=Valentina | last2=Gilbert | first2=Allan S. | last3=Panin | first3=Nicolae | last4=Dolukhanov | first4=Pavel M. | title=The Black Sea Flood Question: Changes in Coastline, Climate and Human Settlement | publisher=Springer | publication-place=Dordrecht | date=2006-11-22 | isbn=1-4020-4774-6 | oclc=ocm77482394}}
Named reference:
<ref name="x123">{{cite book | last=Yanko-Hombach | first=Valentina | last2=Gilbert | first2=Allan S. | last3=Panin | first3=Nicolae | last4=Dolukhanov | first4=Pavel M. | title=The Black Sea Flood Question: Changes in Coastline, Climate and Human Settlement | publisher=Springer | publication-place=Dordrecht | date=2006-11-22 | isbn=1-4020-4774-6 | oclc=ocm77482394 | page=}}</ref>