1. Alan G. Walmsley. "The Early Islamic Period (Umayyad, Abbasid, and Fatimid)" in The Pottery of Jordan: A Manual, ed(s). Jehad Haron & Douglas R. Clark. The American Center of Research, Alexandria, Virginia & Amman, Jordan: The American Center of Research & Madaba Regional Archaeological Museum Project, 2022, 89-107 , Figure 4.83, Page 102-103.
2. Alan G. Walmsley. "The Early Islamic Period (Umayyad, Abbasid, and Fatimid)" in The Pottery of Jordan: A Manual, ed(s). Jehad Haron & Douglas R. Clark. The American Center of Research, Alexandria, Virginia & Amman, Jordan: The American Center of Research & Madaba Regional Archaeological Museum Project, 2022, 89-107 , Figure 4.83, Page 102-103.

origin uncertain