The Arab geographers were al-Masudhi and Ibn Khurdadbeh. See the entry for Wadi Salamun in Friederich Hild and Marcell Restle, Kappadokien (Kappadokia, Charsianon, Sebasteia und Lykandos) (Vienna: Verlag de Österreichischen Akademie der Wissenschafte, 1981), pp. 269–270.