Derrick, Paul Scott. “The Undiscovered Country from Whose Bourn Some Travelers Do Return. The Final Frontier in Poe and Dickinson”. Estudios Ingleses de la Universidad Complutense 10 (January 1, 2002): 217–236. Accessed December 7, 2025. https://revistas.ucm.es/index.php/EIUC/article/view/EIUC0202110217A.