Korhonen A-M, Donaldson L, Kunnari I. Teacher Professional Development in Education 4.0: The Role of ePortfolios and Open Badges. JTE [Internet]. 2022 Jun. 30 [cited 2026 Apr. 7];17(3):13-24. Available from: https://www.jte.edu.vn/index.php/jte/article/view/1221