{{cite web | url=http://www.europeana.eu/resolve/record/08536/BA3D7A8B4CD8A440903710386A558E834D12FFDE|title=Heinrich Heine|author=Oppenheim, Moritz Daniel (Künstler) & it|accessdate=2013-05-23 |publisher=Europeana}}

<ref>{{cite web | url=http://www.europeana.eu/resolve/record/08536/BA3D7A8B4CD8A440903710386A558E834D12FFDE|title=Heinrich Heine|author=Oppenheim, Moritz Daniel (Künstler) & it|accessdate=2013-05-23 |publisher=Europeana}}</ref>