Jadranka Gvozdanović. Numeral Types and Changes Worldwide. Walter de Gruyter. 1999: 221 [2020-07-14]. ISBN 978-3-11-016113-7. （原始内容存档于2020-11-12）.: "The usage of 'Aryan languages' is not to be equated with Indo-Aryan languages, rather Indo-Iranic languages of which Indo-Aryan is a subgrouping."
Bashir, Elena. Jain, Danesh; Cardona, George , 编. The Indo-Aryan languages: 905. 2007. ISBN 978-0415772945. 'Dardic' is a geographic cover term for those Northwest Indo-Aryan languages which [..] developed new characteristics different from the IA languages of the Indo-Gangetic plain. Although the Dardic and Nuristani (previously 'Kafiri') languages were formerly grouped together, Morgenstierne (1965) has established that the Dardic languages are Indo-Aryan, and that the Nuristani languages constitute a separate subgroup of Indo-Iranian.
CIA- The World Factbook: 14.7 million in Turkey (18%)[1] （页面存档备份，存于互联网档案馆）[与来源不符], 4.9–6.5 million in Iraq (15-20%)[2] （页面存档备份，存于互联网档案馆）[与来源不符], 8 million in Iran (10%)Archived copy. [31 March 2011]. （原始内容存档于2012-02-03）.[与来源不符] (all for 2014), plus several million in Syria, neighboring countries, and the diaspora
