^The family is called 'East Trans-Fly' in Usher, an unfortunate synonym with what others call the Eastern Trans-Fly family, which constitutes one of its branches.
^Evans, Nicholas (2018). "The languages of Southern New Guinea". In Palmer, Bill (ed.). The Languages and Linguistics of the New Guinea Area: A Comprehensive Guide. The World of Linguistics. Vol. 4. Berlin: De Gruyter Mouton. pp. 641–774. ISBN978-3-11-028642-7.