xAlison Chapman (ed.) and the DVPP team, “‘Wie kannst du ruhig schlafen?’,” Digital Victorian Periodical Poetry Project, Edition 0.98.11beta
, University of Victoria, 7th May 2025, https://dvpp.uvic.ca/blackwoods/1878/pom_9547_wie_kannst_du_ruhig_schlafen.html.