Poh'lad Lucia Caecilia Firmiana Lactantia na cisára Gaia Galeria Valeria Maximiana v diele De mortibus persecutorum. Lucius Caecilius Firmianus Lactantius's view of the Caesar Gaius Galerius Valerius Maximianus in the work "De mortibus persecutorum". - Jirkal, Emanuel (1998)