Mehrdad Fallahzadeh, Ph. D. (2005), Uppsala University, Sweden, is associate researcher at Uppsala University. He has published books, and a number of articles on historical music theory from Central Asia, Iran, Afghanistan, and the subcontinent, including Shams al-aṣvāt (Uppsala University Press, 2012).Forogh Hashabeiky, Ph. D. (2005), Uppsala University, Sweden, is associate professor at Uppsala University. She has published a number of articles and books, including "Persian Orthography" (2009). and “The Usage of Singular Verbs for Inanimate Plural Subjects in Persian,” in Orientalia Suecana LVI (Uppsala, 2007).