Bozkurt, A. and Zawacki-Richter, O. . (2021) “Trends and Patterns in Distance Education (2014–2019): A Synthesis of Scholarly Publications and a Visualization of the Intellectual Landscape”, The International Review of Research in Open and Distributed Learning, 22(2), pp. 19–45. doi: 10.19173/irrodl.v22i2.5381.