xAlison Chapman (ed.) and the DVPP team, “Sir Olaf. (From the German of Heinrich Heine),” Digital Victorian Periodical Poetry Project, Edition 0.98.5beta, University of Victoria, 14th October 2022, https://dvpp.uvic.ca/onceaweek/1864/pom_693_sir_olaf_from_the_german_of.html.