HAŁUSZKA, Mariusz. Puer Existens: Subverting the Puer Aeternus Figure in the Comic Strip as Exemplified with Bill Watterson’s Calvin and Hobbes. Literatura Ludowa. Journal of Folklore and Popular Culture. Online. 26 May 2019. Vol. 63, no. 1, pp. 24-31. [Accessed 31 December 2025]. DOI 10.12775/LL.1.2019.002.