Bosworth, C.E. „Rawwādids”. Encyclopaedia of Islam (2nd изд.). стр. 469. „The Rawwadids (the form "Rawad" later becomes common in the sources) were originally of Azdi Arab stock, but gradually became assimilated to their environment in Adharbaydjan (and especially, the area around Tabriz) and became Kurdicised...”
P. Bearman, Th. Bianquis, C.E. Bosworth, E. van Donzel, W.P. Heinrichs (editors), Encyclopaedia of Islam (Second Edition), "Marāg̲h̲a", Brill Online.
Minorsky, La Domination des Dailamites, presented in a Conference of the Societé des Etudes Iraniennes, Paris, 28 May 1931. Also see Minorsky, Daylam in the Encyclopaedia of Islam, 1962, pp. 189–94
