^Hammarström (2015) Ethnologue 16/17/18th editions: a comprehensive review: online appendices
^Shintani Tadahiko. 2014. The Zayein language. Linguistic survey of Tay cultural area (LSTCA) no. 102. Tokyo: Research Institute for Languages and Cultures of Asia and Africa (ILCAA).
Shintani Tadahiko. 2014. The Zayein language. Linguistic survey of Tay cultural area (LSTCA) no. 102. Tokyo: Research Institute for Languages and Cultures of Asia and Africa (ILCAA).