Strnadel, Leslie; Erdley, Patrick (2012). Bulgaria. Other Places Travel Guide. Other Places Publishing. стр. 58. ISBN9780982261996. Архивирано из оригинала 2016-12-21. г. Приступљено 2016-12-04.
Nishinari, Katsuyoshi (2019-12-31). Textural Characteristics of World Foods (на језику: енглески). John Wiley & Sons. ISBN978-1-119-43079-7. Архивирано из оригинала 2020-12-18. г. Приступљено 2020-10-31. „Doogh is an Iranian type of traditional fermented dairy-based drinks that is usually produced by mixing set or stirred yogurt and water at the same rate, as well as some aqueous extracts of local herbs, and spices such as thyme.”
Grosart, Alexander (17. 7. 1886). "Soor-doock" and "doogh". The Academy and literature. 30. Blackburn. стр. 59. Архивирано из оригинала 18. 12. 2020. г. Приступљено 31. 10. 2020.CS1 одржавање: Формат датума (веза)
Nishinari, Katsuyoshi (2019-12-31). Textural Characteristics of World Foods (на језику: енглески). John Wiley & Sons. ISBN978-1-119-43079-7. Архивирано из оригинала 2020-12-18. г. Приступљено 2020-10-31. „Doogh consumption is common in Asian countries (e.g. ayran in Turkey, than in Armenia, lassi in southern Asia). However, they may differ from doogh in dilution ratio, rheological characteristics, fat content, and sensory properties.”
Strnadel, Leslie; Erdley, Patrick (2012). Bulgaria. Other Places Travel Guide. Other Places Publishing. стр. 58. ISBN9780982261996. Архивирано из оригинала 2016-12-21. г. Приступљено 2016-12-04.
„Ayran”. Etimoloji Türkçe (на језику: турски). Telif Hakları. Архивирано из оригинала 4. 3. 2016. г. Приступљено 31. 8. 2014.CS1 одржавање: Формат датума (веза)
Nishinari, Katsuyoshi (2019-12-31). Textural Characteristics of World Foods (на језику: енглески). John Wiley & Sons. ISBN978-1-119-43079-7. Архивирано из оригинала 2020-12-18. г. Приступљено 2020-10-31. „Doogh is an Iranian type of traditional fermented dairy-based drinks that is usually produced by mixing set or stirred yogurt and water at the same rate, as well as some aqueous extracts of local herbs, and spices such as thyme.”
Grosart, Alexander (17. 7. 1886). "Soor-doock" and "doogh". The Academy and literature. 30. Blackburn. стр. 59. Архивирано из оригинала 18. 12. 2020. г. Приступљено 31. 10. 2020.CS1 одржавање: Формат датума (веза)
Nishinari, Katsuyoshi (2019-12-31). Textural Characteristics of World Foods (на језику: енглески). John Wiley & Sons. ISBN978-1-119-43079-7. Архивирано из оригинала 2020-12-18. г. Приступљено 2020-10-31. „Doogh consumption is common in Asian countries (e.g. ayran in Turkey, than in Armenia, lassi in southern Asia). However, they may differ from doogh in dilution ratio, rheological characteristics, fat content, and sensory properties.”