Elvi, Mariyanti, Roma Doni Azmi, and Yudi Umara. 2026. “Development of ESD-Integrated Mathematics Teaching Materials in the Maritime Context of the Riau Islands”. Jurnal Absis: Jurnal Pendidikan Matematika Dan Matematika 9 (1):156-68. https://doi.org/10.30606/absis.v9i1.4108.