Yavuz, Mehmet, Şener Balat, Bünyami Kayalı, and Emirhan Gülen. 2026. “The 20-Year Evolution of Distance Education: A Bibliometric and LDA-Based Topic Model Analysis”. The International Review of Research in Open and Distributed Learning 27 (3):204-30. https://doi.org/10.19173/irrodl.v27i3.9164.