van Bladel, Kevin. (2011) “The Bactrian Background of the Barmakids”, A. Akasoy, C. Burnett kaj R. Yoeli-Tlalim: Islam and Tibet: Interactions along the Musk Routes. Londono: Ashgate, p. 43–88. Pro ĵusaj klarigoj de van Bladel, oni scias nun ke la oftaj referencoj en antikva literaturo ke Barmakidoj estas Persaj aŭ Zoroastranaj estas malprecizaj. Vidu ekz., "Barmakids." Encyclopædia Britannica. 2007. Encyclopædia Britannica Online. 4a de Junio 2007, Cyril Glassé (eld.), The New Encyclopedia of Islam, Lanham, MD: Rowman & Littlefield Publishers, revised ed., 2003, ISBN 0-7591-0190-6, elprenaĵo el: p 6: "The 'Abbasid dynasty ruled with the help of the Barmakids, a prominent Persian family from Balkh who, before their conversion, had been priests in the Buddhist monastery of Nawbahar." Josef W. Meri, Jere L. Bacharach, "Medieval Islamic Civilization: L-Z, index", Taylor & Francis, 2006. pg 855: "The Barmakids, a Persian family who had converted to Islam from Buddhism." Liyakatali Takim, "The heirs of the prophet: charisma and religious authority in Shi'ite Islam ", SUNY Press, 2006. p 51: "The Barmakids were a Persian family of secretaries and wazirs who served the early 'Abbassid caliphs in different administrative capacities."
