DJVU PDF Hansson, I.-. 1989, "A comparison of Akha and Hani and Khatu and Pijo", in Linguistics of the Tibeto-Burman Area, vol. 12, no. 1, pp. 6-91. cite.

DJVU PDF Hansson, I.-. 1982, "A phonological comparison of Akha and Hani", in Linguistics of the Tibeto-Burman Area, vol. 7, no. 1, pp. 63-115. cite.

DJVU PDF Wheatley, J.K. 1982, "Comments on the 'Hani' dialects of Loloish", in Linguistics of the Tibeto-Burman Area, vol. 7, no. 1, pp. 1-38. cite.