DJVU Luce, G.H. undated, "Comparative lexicon: Lai - Siyin - SandawayChin - Targkhal Naga", in Luce Collection, MS 6574-7, pp. 028a-028b. National Library of Australia. cite.
DJVU PDF Sreedhar, M. 1990, "Clan, marriage practices, and kinship terms amongst the Ao and Sema Nagas", in Linguistics of the Tibeto-Burman Area, vol. 13, no. 1, pp. 121-139. cite.