Ovadiah, Asher. „The Roman Altar Dedicated to Zeus from Velico Târnovo – Bulgaria: Reconsidered“. Gerión. Revista de Historia Antigua, Bd. 29, Bd. 29, Nr. 2, 2012, S. 35-39, doi: https://doi.org/10.5209/rev_GERI.2011.v29.n2.40271.