Solomon, M. A. ., A. A. . Gebremedhin, and K. W. . Tigistu. “Continuous Professional Development in Higher Education: A Systematic Review of Its Conceptualizations, Trends and Challenges (2011- 2020)”. Bahir Dar Journal of Education, vol. 23, no. 1, May 2023, pp. 21-39, doi:10.4314/bdje.v23i1.