“An Analysis on the Fundamental Concept of Levels and Sublevels in the History of Algebra: An Analysis on the Levels and Sublevels of Algebraic Reasoning in Education”, JASRAE, vol. 15, no. 1, pp. 674–689, Apr. 2018, Accessed: Aug. 21, 2025. [Online]. Available: https://ignited.in/index.php/jasrae/article/view/7689