Gobena, Wakweya Olani. “The Feature of ATR and ATR Harmony in Nilo-Saharan Languages of Ethiopia”. International Journal of Learning, Teaching and Educational Research 16, no. 2 (February 28, 2017): 62–75. Accessed June 19, 2026. https://ijlter.myres.net/index.php/ijlter/article/view/841.