xAlison Chapman (ed.) and the DVPP team, “Sir Olaf. (From the German of Heinrich Heine),” Digital Victorian Periodical Poetry Project, Edition 0.98.11beta
, University of Victoria, 7th May 2025, https://dvpp.uvic.ca/onceaweek/1864/pom_693_sir_olaf_from_the_german_of.html.