The dialects included in the Central branch by R. F. Hahn are also included by M. Osmanov, although he also chooses to go further and divides the Southern branch into three sub-branches: a sub-branch including the dialect of Guma, a sub-branch including the dialects of Elchi and Karakax, and a sub-branch including the dialects of Cheriya, Keriya, Niya and Qiemo.
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M. Osmanov on the other hand has based his classification on two different parameters: the conjugation of the present-future tense and the form of the imperfect participle.