Domokos, G., and K. R. Erős. “Ercole Pio E Le Indulgenze Di Eger”. Verbum – Analecta Neolatina, vol. 16, no. 1-2, Dec. 2015, pp. 43-56, https://verbum-analectaneolatina.hu/index.php/verbum/article/view/391.