KARPETA, Paulina and RADZISZEWSKA, Olga. The Souls in Penance: On the Folk Origin of the Spirit from "I Like It" and Its Relationship with the Spirit from Pcim. Literatura Ludowa. Journal of Folklore and Popular Culture. Online. 17 September 2021. Vol. 64, no. 6, pp. 27-38. [Accessed 5 July 2025]. DOI 10.12775/LL.6.2020.002.