Paul, Heike. „A Trajectory of Billboard Poetry in America: From “Burma-Shave”-Roadside Advertisement to “Three Billboards Outside Ebbing, Missouri”“. Internationale Zeitschrift für Kulturkomparatistik 2 (April 26, 2021): 317–343. Zugegriffen Mai 19, 2024. https://izfk.uni-trier.de/index.php/izfk/article/view/IZfK-Vol-2-A-Trajectory-of-Billboard-Poetry-in-America.