Tyszler, L., and A. Jankowiak. “The Symbolism of Hercules in the Religious and Political Propaganda of the Roman Empire As Attested by a Terra Sigillata Bowl from Górzyca in Słubice County”. Archaeologia Polona, vol. 55, Jan. 2017, pp. 211-24, https://journals.iaepan.pl/apolona/article/view/280.