Smith Soto, Alan. “In Vallejo’s Workshop: Some Comparisons Between the First Versions and Definitive Versions of Poems Published in the First Edition of Los Heraldos Negros”. Espergesia 6, no. 2 (December 30, 2019): 35–51. Accessed July 3, 2024. https://revistas.ucv.edu.pe/index.php/espergesia/article/view/1001.