G. Melvyn Howe, Ronald Grigor Suny, Aleksey Aleksandrovich Mints, Charles James Frank Dowsett, Armenia, Encyclopaedia Britannica. Quote: "In mountainous Karabakh a group of five Armenian maliks (princes) succeeded in conserving their autonomy and maintained a short period of independence (1722–30) during the struggle between Persia and Turkey at the beginning of the 18th century; despite the heroic resistance of the Armenian leader David Beg, the Turks occupied the region but were driven out by the Persians under the general Nādr Qolī Beg (from 1736–47, Nādir Shah) in 1735." - Encyclopaedia of Islam. — Leiden: BRILL, 1986. — vol. 1. — p. 639–640. - Րաֆֆի (Հակոբ Մելիք-Հակոբյան). Խամսայի մելիքութիւնները: Ղարաբաղի աստղագէտը: Գաղտնիքն Ղարաբաղի, Վիեննա, 1906. [Raffi (Hakob Melik-Hakobyan). The History of Karabagh's Meliks, Vienna, 1906, in Armenian. Another edition is «Խամսայի մելիքությունները», Երկերի ժողովածու, Երևան, 1964. Collection of Yerkrapah, Yerevan, 1964.]
