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Kaplony, Andreas (2008). "What Are Those Few Dots for? Thoughts on the Orthography of the Qurra Papyri (709-710), the Khurasan Parchments (755-777) and the Inscription of the Jerusalem Dome of the Rock (692)". Arabica. 55 (1). Brill: 91–112. doi:10.1163/157005808X289331. ISSN1570-0585. JSTOR25162268.