FARROKH, Kaveh, Gholamreza KARAMIAN, i Hamid KARAMIAN. 2021. „Military Architecture and the Four-Spāhbed System for Defense of the Sasanian Empire (224-651 CE)”. Historia I Świat 10 (wrzesień):117-51. https://doi.org/10.34739/his.2021.10.05.