Siswanto, Eko, et al. “Optimalisasi Kemampuan Pemecahan Masalah Matematika Melalui Implementasi Pembelajaran Problem Based Learning (PBL): Systematic Literature Review”. SJME (Supremum Journal of Mathematics Education), vol. 9, no. 1, Jan. 2025, pp. 181-95, doi:10.35706/sjme.v9i1.185.