Nugroho, Khathibul Umam Zaid, Y. L. Sukestiyarno, and Adi Nurcahyo. 2021. “The Weaknesses of Euclidean Geometry: A Step of Needs Analysis of Non-Euclidean Geometry Learning through an Ethnomathematics Approach”. Edumatika : Jurnal Riset Pendidikan Matematika 4 (2):126-49. https://doi.org/10.32939/ejrpm.v4i2.1015.