Gagatsis, Athanasios, Areti Panaoura, Stylianna Nicolaou, Iliada Elia, Eleni Deliyianni, and Stylianos Stamatakis. 2021. “The Role of Representations in the Understanding of Mathematical Concepts in Higher Education: The Case of Function for Economics Students ”. Journal of Research in Science Mathematics and Technology Education 5 (1), 69-92. https://doi.org/10.31756/jrsmte.513.