Strootman, Rolf. „SELEUCID EMPIRE”. Encyclopædia Iranica (online изд.). Приступљено 16. 4. 2015. „In northern Iran, the principal Seleucid strongholds were Rhagae (near Tehran) and Hecatompylus (perhaps Šahr-e Qumis).”
Duchesne-Guillemin, Jacques (21. 11. 2011). „DEIPNOSOPHISTAÍ”. Encyclopædia Iranica. VII. стр. 227—229. „The Parthian kings, according to Athenaeus (12.513f-14a), continued the Achaemenid practice of shifting the capital according to the season, spending the spring in Rhagae, the winter in Babylon, and the rest of the year in Hecatompylos (cf. Strabo, 16.1.16).”
Shahbazi, A. Shapur (13. 10. 2011). „CHARAX”. Encyclopædia Iranica. V. стр. 365—366.
Shahbazi, A. Shapour (26. 7. 2016). „Bahrām VI Čōbīn”. Encyclopædia Iranica. III. стр. 514—522. „(...) the family of Mehrān, one of the seven great houses of the Sasanian period (...) the family remained the hereditary margraves of Ray and produced notable generals (...) Mehrān, whose own son, Sīāvoš, King of Ray, fell fighting the Arabs in 643 (...)”
Scarce, J. M. (15. 8. 2011). „ART IN IRAN x.1 Art and Architecture of the Qajar Period”. Encyclopædia Iranica. II. стр. 627—637. „The Qajars were diligent patrons, and their work can be seen at the important shrines of Imam Reżā at Mašhad, Fāṭema Maʿṣūma at Qom, ʿAbd-al-ʿAẓīm at Ray, (...) Second, mirrorwork mosaic, a technique used in late Safavid times to sheath a surface, was fully developed in the Qajar period. It was used to cover the inner surface of an ayvān or tālār as for example in the shrine of Shah ʿAbd-al-ʿAẓīm at Ray (...)”
Hillenbrand, R. (11. 8. 2011). „ARCHITECTURE vi. Safavid to Qajar Periods”. Encyclopædia Iranica. II. стр. 345—349. „Their size naturally recalls Safavid work; indeed, the Qajars expanded Safavid buildings (e.g., Qom and Māhān) or imitated their decoration, sometimes quite shamelessly (e.g., golden ayvāns or domes at Mašhad, Ray, and Qom).”
