Pauji, I., H. Hadi, and D. Juandi. “Systematic Literature Review: Analysis of Learning Obstacle in Didactical Design Research on Geometry Material”. Jurnal Cendekia : Jurnal Pendidikan Matematika, Vol. 7, no. 3, Aug. 2023, pp. 2895-06, doi:10.31004/cendekia.v7i3.2474.