^Liljegren, Henrik (2016). A grammar of Palula (8 ed.). Biori and Ashret: Language Science Press, 2016. p. 4. ISBN9783946234319.
^Liljegren, Henrik (2016). A grammar of Palula. Language Science Press, 2016. p. 1. ISBN9783946234319.
^Cacopardo, Alberto M.; Cacopardo, Augusto S. (2001). Gates of Peristan: History, Religion and Society in the Hindu Kush. IsIAO, 2001. p. 96. ISBN9788863231496.